diff --git a/internal/frontend/directory.go b/internal/frontend/directory.go
index 5a1a421..cae9c51 100644
--- a/internal/frontend/directory.go
+++ b/internal/frontend/directory.go
@@ -14,16 +14,6 @@
 	"golang.org/x/pkgsite/internal/version"
 )
 
-// Directories is the directory listing for all directories in the unit,
-// which is listed in the directories section of the main page.
-type Directories struct {
-	// External contains all of the non-internal directories for the unit.
-	External []*Directory
-
-	// Internal contains the top level internal directory for the unit, if any.
-	Internal *Directory
-}
-
 // Directory is either a nested module or subdirectory of a unit, organized in
 // a two level tree structure. This content is used in the
 // directories section of the unit page.
@@ -42,15 +32,16 @@
 // relative to the path of a given unit. This content is used in the
 // Directories section of the unit page.
 type DirectoryInfo struct {
-	Suffix   string
-	URL      string
-	Synopsis string
-	IsModule bool
+	Suffix     string
+	URL        string
+	Synopsis   string
+	IsModule   bool
+	IsInternal bool
 }
 
 // unitDirectories zips the subdirectories and nested modules together in a two
 // level tree hierarchy.
-func unitDirectories(directories []*DirectoryInfo) *Directories {
+func unitDirectories(directories []*DirectoryInfo) []*Directory {
 	if len(directories) == 0 {
 		return nil
 	}
@@ -64,9 +55,8 @@
 		// Skip internal directories that are not in the top level internal
 		// directory. For example, foo/internal and foo/internal/bar should
 		// be skipped, but internal/foo should be included.
-		if prefix != "internal" && (strings.HasSuffix(d.Suffix, "/internal") ||
-			strings.Contains(d.Suffix, "/internal/")) {
-			continue
+		if strings.HasSuffix(d.Suffix, "/internal") || strings.Contains(d.Suffix, "/internal/") {
+			d.IsInternal = true
 		}
 		if _, ok := mappedDirs[prefix]; !ok {
 			mappedDirs[prefix] = &Directory{Prefix: prefix}
@@ -79,18 +69,14 @@
 		}
 	}
 
-	section := &Directories{}
-	for prefix, dir := range mappedDirs {
-		if prefix == "internal" {
-			section.Internal = dir
-		} else {
-			section.External = append(section.External, dir)
-		}
+	var dirs []*Directory
+	for _, dir := range mappedDirs {
+		dirs = append(dirs, dir)
 	}
-	sort.Slice(section.External, func(i, j int) bool {
-		return section.External[i].Prefix < section.External[j].Prefix
+	sort.Slice(dirs, func(i, j int) bool {
+		return dirs[i].Prefix < dirs[j].Prefix
 	})
-	return section
+	return dirs
 }
 
 func getNestedModules(ctx context.Context, ds internal.DataSource, um *internal.UnitMeta, sds []*DirectoryInfo) ([]*DirectoryInfo, error) {
diff --git a/internal/frontend/directory_test.go b/internal/frontend/directory_test.go
index 632511a..f7c9d72 100644
--- a/internal/frontend/directory_test.go
+++ b/internal/frontend/directory_test.go
@@ -138,39 +138,40 @@
 		{Suffix: "pubsub/internal", IsModule: true},
 	}
 	got := unitDirectories(append(subdirectories, nestedModules...))
-	want := &Directories{
-		External: []*Directory{
-			{
-				Prefix: "accessapproval",
-				Root:   &DirectoryInfo{Suffix: "accessapproval"},
-				Subdirectories: []*DirectoryInfo{
-					{Suffix: "cgi"},
-					{Suffix: "cookiejar"},
-				},
-			},
-			{
-				Prefix: "fgci",
-				Root:   &DirectoryInfo{Suffix: "fgci"},
-			},
-			{
-				Prefix: "httptest",
-				Root:   &DirectoryInfo{Suffix: "httptest", IsModule: true},
-			},
-			{
-				Prefix: "httptrace",
-				Root:   &DirectoryInfo{Suffix: "httptrace"},
-			},
-			{
-				Prefix: "zoltan",
-				Root:   &DirectoryInfo{Suffix: "zoltan"},
+	want := []*Directory{
+		{
+			Prefix: "accessapproval",
+			Root:   &DirectoryInfo{Suffix: "accessapproval"},
+			Subdirectories: []*DirectoryInfo{
+				{Suffix: "internal", IsInternal: true},
+				{Suffix: "cgi"},
+				{Suffix: "cookiejar"},
+				{Suffix: "cookiejar/internal", IsInternal: true},
 			},
 		},
-		Internal: &Directory{
-			Prefix: "internal",
-			Subdirectories: []*DirectoryInfo{
-				{Suffix: "bytesconv"},
-				{Suffix: "json"},
-			},
+		{
+			Prefix: "fgci",
+			Root:   &DirectoryInfo{Suffix: "fgci"},
+		},
+		{
+			Prefix: "httptest",
+			Root:   &DirectoryInfo{Suffix: "httptest", IsModule: true},
+		},
+		{
+			Prefix: "httptrace",
+			Root:   &DirectoryInfo{Suffix: "httptrace"},
+		},
+		{
+			Prefix:         "internal",
+			Subdirectories: []*DirectoryInfo{{Suffix: "bytesconv"}, {Suffix: "json"}},
+		},
+		{
+			Prefix:         "pubsub",
+			Subdirectories: []*DirectoryInfo{{Suffix: "internal", IsModule: true, IsInternal: true}},
+		},
+		{
+			Prefix: "zoltan",
+			Root:   &DirectoryInfo{Suffix: "zoltan"},
 		},
 	}
 
diff --git a/internal/frontend/main.go b/internal/frontend/main.go
index ff4b703..fe3792c 100644
--- a/internal/frontend/main.go
+++ b/internal/frontend/main.go
@@ -25,7 +25,7 @@
 type MainDetails struct {
 	// Directories are packages and nested modules relative to the path for the
 	// unit.
-	Directories *Directories
+	Directories []*Directory
 
 	// Licenses contains license metadata used in the header.
 	Licenses []LicenseMetadata
diff --git a/static/frontend/unit/main/_directories.css b/static/frontend/unit/main/_directories.css
index 0f770ac..a36bbba 100644
--- a/static/frontend/unit/main/_directories.css
+++ b/static/frontend/unit/main/_directories.css
@@ -130,6 +130,14 @@
   padding: 0.5rem 1rem;
 }
 
+.UnitDirectories-internal {
+  display: none;
+}
+
+.UnitDirectories-showInternal .UnitDirectories-internal {
+  display: table-row;
+}
+
 .UnitDirectories-mobileSynopsis {
   display: none;
   line-height: 1.25rem;
@@ -147,20 +155,25 @@
   }
 }
 
-.UnitDirectories-expandButton {
+.UnitDirectories-toggles {
   position: relative;
 }
 
-.UnitDirectories-expandButton button {
+.UnitDirectories-toggleButtons {
+  bottom: 1rem;
+  display: flex;
+  gap: 1rem;
+  position: absolute;
+  right: 0;
+}
+
+.UnitDirectories-toggleButtons button {
   background-color: transparent;
   border: none;
-  bottom: 1rem;
   color: var(--color-brand-primary);
   cursor: pointer;
   display: none;
   font-size: 0.875rem;
-  position: absolute;
-  right: 0;
   text-decoration: none;
 }
 
diff --git a/static/frontend/unit/main/_directories.tmpl b/static/frontend/unit/main/_directories.tmpl
index 3fa26ea..08c09a4 100644
--- a/static/frontend/unit/main/_directories.tmpl
+++ b/static/frontend/unit/main/_directories.tmpl
@@ -11,11 +11,17 @@
       Directories
       <a class="UnitDirectories-idLink" href="#section-directories">¶</a>
     </h2>
-    <div class="UnitDirectories-expandButton">
-      <button class="js-expandAllDirectories" data-test-id="directories-toggle"
-          data-gtmc="directories button" aria-label="Expand All Directories">
-        Expand all
-      </button>
+    <div class="UnitDirectories-toggles">
+      <div class="UnitDirectories-toggleButtons">
+        <button class="js-showInternalDirectories" data-test-id="internal-directories-toggle"
+            data-gtmc="directories button" aria-label="Show Internal Directories">
+          Show internal
+        </button>
+        <button class="js-expandAllDirectories" data-test-id="directories-toggle"
+            data-gtmc="directories button" aria-label="Expand All Directories">
+          Expand all
+        </button>
+      </div>
     </div>
     <table class="UnitDirectories-table UnitDirectories-table--tree js-expandableTable"
           data-test-id="UnitDirectories-table">
@@ -23,19 +29,17 @@
         <th>Path</th>
         <th class="UnitDirectories-desktopSynopsis">Synopsis</th>
       </tr>
-      {{range $dir := .Directories.External}}
+      {{range $dir := .Directories}}
           {{template "directory" .}}
       {{end}}
-      {{if .Directories.Internal}}
-          {{template "directory" .Directories.Internal}}
-      {{end}}
     </table>
   </div>
 {{end}}
 
 {{define "directory"}}
   {{$prefix := .Prefix}}
-  <tr{{if .Subdirectories}} data-aria-controls="{{range .Subdirectories}}{{$prefix}}-{{.Suffix}} {{end}}"{{end}}>
+  <tr{{if .Subdirectories}} data-aria-controls="{{range .Subdirectories}}{{$prefix}}-{{.Suffix}} {{end}}"{{end}}
+      class="{{if eq $prefix "internal"}}UnitDirectories-internal{{end}}">
     <td data-id="{{$prefix}}" data-aria-owns="{{range .Subdirectories}}{{$prefix}}-{{.Suffix}} {{end}}">
       <div class="UnitDirectories-pathCell">
         <div>
@@ -65,7 +69,7 @@
     {{- end -}}
   </tr>
   {{- range .Subdirectories -}}
-    <tr data-id="{{$prefix}}-{{.Suffix}}">
+    <tr data-id="{{$prefix}}-{{.Suffix}}" class="{{if .IsInternal}}UnitDirectories-internal{{end}}">
       <td>
         <div class="UnitDirectories-subdirectory">
           <span>
diff --git a/static/frontend/unit/main/main.js b/static/frontend/unit/main/main.js
index 5225158..92a32d4 100644
--- a/static/frontend/unit/main/main.js
+++ b/static/frontend/unit/main/main.js
@@ -1,9 +1,9 @@
-var d={PLAY_HREF:".js-exampleHref",PLAY_CONTAINER:".js-exampleContainer",EXAMPLE_INPUT:".Documentation-exampleCode",EXAMPLE_OUTPUT:".Documentation-exampleOutput",EXAMPLE_ERROR:".Documentation-exampleError",PLAY_BUTTON:".Documentation-examplePlayButton",SHARE_BUTTON:".Documentation-exampleShareButton",FORMAT_BUTTON:".Documentation-exampleFormatButton",RUN_BUTTON:".Documentation-exampleRunButton"},E=class{constructor(e){this.exampleEl=e;var t,i,s,r;this.exampleEl=e,this.anchorEl=e.querySelector("a"),this.errorEl=e.querySelector(d.EXAMPLE_ERROR),this.playButtonEl=e.querySelector(d.PLAY_BUTTON),this.shareButtonEl=e.querySelector(d.SHARE_BUTTON),this.formatButtonEl=e.querySelector(d.FORMAT_BUTTON),this.runButtonEl=e.querySelector(d.RUN_BUTTON),this.inputEl=this.makeTextArea(e.querySelector(d.EXAMPLE_INPUT)),this.outputEl=e.querySelector(d.EXAMPLE_OUTPUT),(t=this.playButtonEl)==null||t.addEventListener("click",()=>this.handleShareButtonClick()),(i=this.shareButtonEl)==null||i.addEventListener("click",()=>this.handleShareButtonClick()),(s=this.formatButtonEl)==null||s.addEventListener("click",()=>this.handleFormatButtonClick()),(r=this.runButtonEl)==null||r.addEventListener("click",()=>this.handleRunButtonClick()),this.inputEl&&(this.resize(),this.inputEl.addEventListener("keyup",()=>this.resize()),this.inputEl.addEventListener("keydown",l=>this.onKeydown(l)))}makeTextArea(e){var i,s;let t=document.createElement("textarea");return t.classList.add("Documentation-exampleCode","code"),t.spellcheck=!1,t.value=(i=e==null?void 0:e.textContent)!=null?i:"",(s=e==null?void 0:e.parentElement)==null||s.replaceChild(t,e),t}getAnchorHash(){var e;return(e=this.anchorEl)==null?void 0:e.hash}expand(){this.exampleEl.open=!0}resize(){var e;if((e=this.inputEl)!=null&&e.value){let t=(this.inputEl.value.match(/\n/g)||[]).length;this.inputEl.style.height=`${(20+t*20+12+2)/16}rem`}}onKeydown(e){e.key==="Tab"&&(document.execCommand("insertText",!1,"	"),e.preventDefault())}setInputText(e){this.inputEl&&(this.inputEl.value=e)}setOutputText(e){this.outputEl&&(this.outputEl.textContent=e)}appendToOutputText(e){this.outputEl&&(this.outputEl.textContent+=e)}setOutputHTML(e){this.outputEl&&(this.outputEl.innerHTML=e)}setErrorText(e){this.errorEl&&(this.errorEl.textContent=e),this.setOutputText("An error has occurred\u2026")}getCodeWithModFile(){var i,s,r,l;let e=(s=(i=this.inputEl)==null?void 0:i.value)!=null?s:"",t=(l=(r=document.querySelector(".js-playgroundVars"))==null?void 0:r.dataset)!=null?l:{};return t.modulepath!=="std"&&(e=e.concat(`
+var d={PLAY_HREF:".js-exampleHref",PLAY_CONTAINER:".js-exampleContainer",EXAMPLE_INPUT:".Documentation-exampleCode",EXAMPLE_OUTPUT:".Documentation-exampleOutput",EXAMPLE_ERROR:".Documentation-exampleError",PLAY_BUTTON:".Documentation-examplePlayButton",SHARE_BUTTON:".Documentation-exampleShareButton",FORMAT_BUTTON:".Documentation-exampleFormatButton",RUN_BUTTON:".Documentation-exampleRunButton"},b=class{constructor(e){this.exampleEl=e;var t,i,s,r;this.exampleEl=e,this.anchorEl=e.querySelector("a"),this.errorEl=e.querySelector(d.EXAMPLE_ERROR),this.playButtonEl=e.querySelector(d.PLAY_BUTTON),this.shareButtonEl=e.querySelector(d.SHARE_BUTTON),this.formatButtonEl=e.querySelector(d.FORMAT_BUTTON),this.runButtonEl=e.querySelector(d.RUN_BUTTON),this.inputEl=this.makeTextArea(e.querySelector(d.EXAMPLE_INPUT)),this.outputEl=e.querySelector(d.EXAMPLE_OUTPUT),(t=this.playButtonEl)==null||t.addEventListener("click",()=>this.handleShareButtonClick()),(i=this.shareButtonEl)==null||i.addEventListener("click",()=>this.handleShareButtonClick()),(s=this.formatButtonEl)==null||s.addEventListener("click",()=>this.handleFormatButtonClick()),(r=this.runButtonEl)==null||r.addEventListener("click",()=>this.handleRunButtonClick()),this.inputEl&&(this.resize(),this.inputEl.addEventListener("keyup",()=>this.resize()),this.inputEl.addEventListener("keydown",l=>this.onKeydown(l)))}makeTextArea(e){var i,s;let t=document.createElement("textarea");return t.classList.add("Documentation-exampleCode","code"),t.spellcheck=!1,t.value=(i=e==null?void 0:e.textContent)!=null?i:"",(s=e==null?void 0:e.parentElement)==null||s.replaceChild(t,e),t}getAnchorHash(){var e;return(e=this.anchorEl)==null?void 0:e.hash}expand(){this.exampleEl.open=!0}resize(){var e;if((e=this.inputEl)!=null&&e.value){let t=(this.inputEl.value.match(/\n/g)||[]).length;this.inputEl.style.height=`${(20+t*20+12+2)/16}rem`}}onKeydown(e){e.key==="Tab"&&(document.execCommand("insertText",!1,"	"),e.preventDefault())}setInputText(e){this.inputEl&&(this.inputEl.value=e)}setOutputText(e){this.outputEl&&(this.outputEl.textContent=e)}appendToOutputText(e){this.outputEl&&(this.outputEl.textContent+=e)}setOutputHTML(e){this.outputEl&&(this.outputEl.innerHTML=e)}setErrorText(e){this.errorEl&&(this.errorEl.textContent=e),this.setOutputText("An error has occurred\u2026")}getCodeWithModFile(){var i,s,r,l;let e=(s=(i=this.inputEl)==null?void 0:i.value)!=null?s:"",t=(l=(r=document.querySelector(".js-playgroundVars"))==null?void 0:r.dataset)!=null?l:{};return t.modulepath!=="std"&&(e=e.concat(`
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 module play.ground
 
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+`)),e}handleShareButtonClick(){let e="https://play.golang.org/p/";this.setOutputText("Waiting for remote server\u2026"),fetch("/play/share",{method:"POST",body:this.getCodeWithModFile()}).then(t=>t.text()).then(t=>{let i=e+t;this.setOutputHTML(`<a href="${i}">${i}</a>`),window.open(i)}).catch(t=>{this.setErrorText(t)})}handleFormatButtonClick(){var t,i;this.setOutputText("Waiting for remote server\u2026");let e=new FormData;e.append("body",(i=(t=this.inputEl)==null?void 0:t.value)!=null?i:""),fetch("/play/fmt",{method:"POST",body:e}).then(s=>s.json()).then(({Body:s,Error:r})=>{this.setOutputText(r||"Done."),s&&(this.setInputText(s),this.resize())}).catch(s=>{this.setErrorText(s)})}handleRunButtonClick(){this.setOutputText("Waiting for remote server\u2026"),fetch("/play/compile",{method:"POST",body:JSON.stringify({body:this.getCodeWithModFile(),version:2})}).then(e=>e.json()).then(async({Events:e,Errors:t})=>{this.setOutputText(t||"");for(let i of 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n.treeitems){if(Number(l.depth)>4)continue;l.groupTreeitem?(r=s[l.groupTreeitem.label],r||(r=s[l.groupTreeitem.label]=document.createElement("optgroup"),r.label=l.groupTreeitem.label,t.appendChild(r))):r=i;let a=document.createElement("option");a.label=l.label,a.textContent=l.label,a.value=l.el.href.replace(window.location.origin,"").replace("/",""),r.appendChild(a)}return n.addObserver(l=>{var c;let a=l.el.hash,h=(c=t.querySelector(`[value$="${a}"]`))==null?void 0:c.value;h&&(t.value=h)},50),e}var f=class{constructor(e){this.el=e;this.handleResize=()=>{this.el.style.setProperty("--js-tree-height","100vh"),this.el.style.setProperty("--js-tree-height",this.el.clientHeight+"px")};this.treeitems=[],this.firstChars=[],this.firstTreeitem=null,this.lastTreeitem=null,this.observerCallbacks=[],this.init()}init(){this.handleResize(),window.addEventListener("resize",this.handleResize),this.findTreeItems(),this.updateVisibleTreeitems(),this.observeTargets(),this.firstTreeitem&&(this.firstTreeitem.el.tabIndex=0)}observeTargets(){this.addObserver(i=>{this.expandTreeitem(i),this.setSelected(i)});let e=new Map,t=new IntersectionObserver(i=>{for(let s of i)e.set(s.target.id,s.isIntersecting||s.intersectionRatio===1);for(let[s,r]of e)if(r){let l=this.treeitems.find(a=>{var h;return(h=a.el)==null?void 0:h.href.endsWith(`#${s}`)});if(l)for(let a of this.observerCallbacks)a(l);break}},{threshold:1,rootMargin:"-60px 0px 0px 0px"});for(let i of this.treeitems.map(s=>s.el.getAttribute("href")))if(i){let s=i.replace(window.location.origin,"").replace("/","").replace("#",""),r=document.getElementById(s);r&&t.observe(r)}}addObserver(e,t=200){this.observerCallbacks.push(M(e,t))}setFocusToNextItem(e){let t=null;for(let i=e.index+1;i<this.treeitems.length;i++){let s=this.treeitems[i];if(s.isVisible){t=s;break}}t&&this.setFocusToItem(t)}setFocusToPreviousItem(e){let t=null;for(let i=e.index-1;i>-1;i--){let s=this.treeitems[i];if(s.isVisible){t=s;break}}t&&this.setFocusToItem(t)}setFocusToParentItem(e){e.groupTreeitem&&this.setFocusToItem(e.groupTreeitem)}setFocusToFirstItem(){this.firstTreeitem&&this.setFocusToItem(this.firstTreeitem)}setFocusToLastItem(){this.lastTreeitem&&this.setFocusToItem(this.lastTreeitem)}setSelected(e){var t;for(let i of this.el.querySelectorAll('[aria-expanded="true"]'))i!==e.el&&((t=i.nextElementSibling)!=null&&t.contains(e.el)||i.setAttribute("aria-expanded","false"));for(let i of 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0:s.tagName.toLowerCase())==="li"&&(s==null||s.setAttribute("role","none")),e.setAttribute("aria-level",this.depth+""),e.getAttribute("aria-label")&&(this.label=(c=(h=e==null?void 0:e.getAttribute("aria-label"))==null?void 0:h.trim())!=null?c:""),this.isExpandable=!1,this.isVisible=!1,this.isInGroup=!!i;let r=e.nextElementSibling;for(;r;){if(r.tagName.toLowerCase()=="ul"){let L=`${(y=i==null?void 0:i.label)!=null?y:""} nav group 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e=this.el;this.isExpandable&&(e=(t=e.firstElementChild)!=null?t:e),e.classList.add("focus")}handleBlur(){var t;let e=this.el;this.isExpandable&&(e=(t=e.firstElementChild)!=null?t:e),e.classList.remove("focus")}handleKeydown(e){if(e.altKey||e.ctrlKey||e.metaKey)return;let t=!1;switch(e.key){case" ":case"Enter":this.isExpandable?(this.isExpanded()&&this.isSelected()?this.tree.collapseTreeitem(this):this.tree.expandTreeitem(this),t=!0):e.stopPropagation(),this.tree.setSelected(this);break;case"ArrowUp":this.tree.setFocusToPreviousItem(this),t=!0;break;case"ArrowDown":this.tree.setFocusToNextItem(this),t=!0;break;case"ArrowRight":this.isExpandable&&(this.isExpanded()?this.tree.setFocusToNextItem(this):this.tree.expandTreeitem(this)),t=!0;break;case"ArrowLeft":this.isExpandable&&this.isExpanded()?(this.tree.collapseTreeitem(this),t=!0):this.isInGroup&&(this.tree.setFocusToParentItem(this),t=!0);break;case"Home":this.tree.setFocusToFirstItem(),t=!0;break;case"End":this.tree.setFocusToLastItem(),t=!0;break;default:e.key.length===1&&e.key.match(/\S/)&&(e.key=="*"?this.tree.expandAllSiblingItems(this):this.tree.setFocusByFirstCharacter(this,e.key),t=!0);break}t&&(e.stopPropagation(),e.preventDefault())}};function M(n,e){let t;return(...i)=>{let 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u(){history.replaceState(null,"",`${location.pathname}#section-readme`),o==null||o.classList.add("UnitReadme--expanded")}function w(){var t;if(!location.hash)return;let n=document.getElementById(location.hash.slice(1)),e=(t=n==null?void 0:n.parentElement)==null?void 0:t.parentElement;(e==null?void 0:e.nodeName)==="DETAILS"&&(e.open=!0)}w();window.addEventListener("hashchange",()=>w());document.querySelectorAll(".js-buildContextSelect").forEach(n=>{n.addEventListener("change",e=>{window.location.search=`?GOOS=${e.target.value}`})});
 /*!
  * @license
  * Copyright 2021 The Go Authors. All rights reserved.
diff --git a/static/frontend/unit/main/main.js.map b/static/frontend/unit/main/main.js.map
index f6cd0f8..f287142 100644
--- a/static/frontend/unit/main/main.js.map
+++ b/static/frontend/unit/main/main.js.map
@@ -1,7 +1,7 @@
 {
   "version": 3,
   "sources": ["../../../shared/playground/playground.ts", "../../../shared/outline/select.ts", "../../../shared/outline/tree.ts", "../../../shared/table/table.ts", "main.ts"],
-  "sourcesContent": ["/*!\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n// This file implements the playground implementation of the documentation\n// page. The playground involves a \"play\" button that allows you to open up\n// a new link to play.golang.org using the example code.\n\n// The CSS is in static/frontend/unit/main/_doc.css\n\n/**\n * CSS classes used by PlaygroundExampleController\n */\nconst PlayExampleClassName = {\n  PLAY_HREF: '.js-exampleHref',\n  PLAY_CONTAINER: '.js-exampleContainer',\n  EXAMPLE_INPUT: '.Documentation-exampleCode',\n  EXAMPLE_OUTPUT: '.Documentation-exampleOutput',\n  EXAMPLE_ERROR: '.Documentation-exampleError',\n  PLAY_BUTTON: '.Documentation-examplePlayButton',\n  SHARE_BUTTON: '.Documentation-exampleShareButton',\n  FORMAT_BUTTON: '.Documentation-exampleFormatButton',\n  RUN_BUTTON: '.Documentation-exampleRunButton',\n};\n\n/**\n * This controller enables playground examples to expand their dropdown or\n * generate shareable Go Playground URLs.\n */\nexport class PlaygroundExampleController {\n  /**\n   * The anchor tag used to identify the container with an example href.\n   * There is only one in an example container div.\n   */\n  private readonly anchorEl: HTMLAnchorElement | null;\n\n  /**\n   * The error element\n   */\n  private readonly errorEl: Element | null;\n\n  /**\n   * Buttons that redirect to an example's playground, this element\n   * only exists in executable examples.\n   */\n  private readonly playButtonEl: Element | null;\n  private readonly shareButtonEl: Element | null;\n\n  /**\n   * Button that formats the code in an example's playground.\n   */\n  private readonly formatButtonEl: Element | null;\n\n  /**\n   * Button that runs the code in an example's playground, this element\n   * only exists in executable examples.\n   */\n  private readonly runButtonEl: Element | null;\n\n  /**\n   * The executable code of an example.\n   */\n  private readonly inputEl: HTMLTextAreaElement | null;\n\n  /**\n   * The output of the given example code. This only exists if the\n   * author of the package provides an output for this example.\n   */\n  private readonly outputEl: Element | null;\n\n  /**\n   * @param exampleEl The div that contains playground content for the given example.\n   */\n  constructor(private readonly exampleEl: HTMLDetailsElement) {\n    this.exampleEl = exampleEl;\n    this.anchorEl = exampleEl.querySelector('a');\n    this.errorEl = exampleEl.querySelector(PlayExampleClassName.EXAMPLE_ERROR);\n    this.playButtonEl = exampleEl.querySelector(PlayExampleClassName.PLAY_BUTTON);\n    this.shareButtonEl = exampleEl.querySelector(PlayExampleClassName.SHARE_BUTTON);\n    this.formatButtonEl = exampleEl.querySelector(PlayExampleClassName.FORMAT_BUTTON);\n    this.runButtonEl = exampleEl.querySelector(PlayExampleClassName.RUN_BUTTON);\n    this.inputEl = this.makeTextArea(exampleEl.querySelector(PlayExampleClassName.EXAMPLE_INPUT));\n    this.outputEl = exampleEl.querySelector(PlayExampleClassName.EXAMPLE_OUTPUT);\n\n    // This is legacy listener to be replaced the listener for shareButtonEl.\n    this.playButtonEl?.addEventListener('click', () => this.handleShareButtonClick());\n    this.shareButtonEl?.addEventListener('click', () => this.handleShareButtonClick());\n    this.formatButtonEl?.addEventListener('click', () => this.handleFormatButtonClick());\n    this.runButtonEl?.addEventListener('click', () => this.handleRunButtonClick());\n\n    if (!this.inputEl) return;\n\n    this.resize();\n    this.inputEl.addEventListener('keyup', () => this.resize());\n    this.inputEl.addEventListener('keydown', e => this.onKeydown(e));\n  }\n\n  /**\n   * Replace the pre element with a textarea. The examples are initially rendered\n   * as pre elements so they're fully visible when JS is disabled.\n   */\n  makeTextArea(el: Element | null): HTMLTextAreaElement {\n    const t = document.createElement('textarea');\n    t.classList.add('Documentation-exampleCode', 'code');\n    t.spellcheck = false;\n    t.value = el?.textContent ?? '';\n    el?.parentElement?.replaceChild(t, el);\n    return t;\n  }\n\n  /**\n   * Retrieve the hash value of the anchor element.\n   */\n  getAnchorHash(): string | undefined {\n    return this.anchorEl?.hash;\n  }\n\n  /**\n   * Expands the current playground example.\n   */\n  expand(): void {\n    this.exampleEl.open = true;\n  }\n\n  /**\n   * Resizes the input element to accommodate the amount of text present.\n   */\n  private resize(): void {\n    if (this.inputEl?.value) {\n      const numLineBreaks = (this.inputEl.value.match(/\\n/g) || []).length;\n      // min-height + lines x line-height + padding + border\n      this.inputEl.style.height = `${(20 + numLineBreaks * 20 + 12 + 2) / 16}rem`;\n    }\n  }\n\n  /**\n   * Handler to override keyboard behavior in the playground's\n   * textarea element.\n   *\n   * Tab key inserts tabs into the example playground instead of\n   * switching to the next interactive element.\n   * @param e input element keyboard event.\n   */\n  private onKeydown(e: KeyboardEvent) {\n    if (e.key === 'Tab') {\n      document.execCommand('insertText', false, '\\t');\n      e.preventDefault();\n    }\n  }\n\n  /**\n   * Changes the text of the example's input box.\n   */\n  private setInputText(output: string) {\n    if (this.inputEl) {\n      this.inputEl.value = output;\n    }\n  }\n\n  /**\n   * Changes the text of the example's output box.\n   */\n  private setOutputText(output: string) {\n    if (this.outputEl) {\n      this.outputEl.textContent = output;\n    }\n  }\n\n  /**\n   * Appends to the text of the example's output box.\n   */\n  private appendToOutputText(output: string) {\n    if (this.outputEl) {\n      this.outputEl.textContent += output;\n    }\n  }\n\n  private setOutputHTML(output: string) {\n    if (this.outputEl) {\n      this.outputEl.innerHTML = output;\n    }\n  }\n\n  /**\n   * Sets the error message text and overwrites\n   * output box to indicate a failed response.\n   */\n  private setErrorText(err: string) {\n    if (this.errorEl) {\n      this.errorEl.textContent = err;\n    }\n    this.setOutputText('An error has occurred\u2026');\n  }\n\n  private getCodeWithModFile(): string {\n    let codeWithModFile = this.inputEl?.value ?? '';\n    const moduleVars = document.querySelector<HTMLDivElement>('.js-playgroundVars')?.dataset ?? {};\n    if (moduleVars.modulepath !== 'std') {\n      codeWithModFile = codeWithModFile.concat(`\n-- go.mod --\nmodule play.ground\n\nrequire ${moduleVars.modulepath} ${moduleVars.version}\n`);\n    }\n\n    return codeWithModFile;\n  }\n\n  /**\n   * Opens a new window to play.golang.org using the\n   * example snippet's code in the playground.\n   */\n  private handleShareButtonClick() {\n    const PLAYGROUND_BASE_URL = 'https://play.golang.org/p/';\n\n    this.setOutputText('Waiting for remote server\u2026');\n\n    fetch('/play/share', {\n      method: 'POST',\n      body: this.getCodeWithModFile(),\n    })\n      .then(res => res.text())\n      .then(shareId => {\n        const href = PLAYGROUND_BASE_URL + shareId;\n        this.setOutputHTML(`<a href=\"${href}\">${href}</a>`);\n        window.open(href);\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n\n  /**\n   * Runs gofmt on the example snippet in the playground.\n   */\n  private handleFormatButtonClick() {\n    this.setOutputText('Waiting for remote server\u2026');\n    const body = new FormData();\n    body.append('body', this.inputEl?.value ?? '');\n\n    fetch('/play/fmt', {\n      method: 'POST',\n      body: body,\n    })\n      .then(res => res.json())\n      .then(({ Body, Error }) => {\n        this.setOutputText(Error || 'Done.');\n        if (Body) {\n          this.setInputText(Body);\n          this.resize();\n        }\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n\n  /**\n   * Runs the code snippet in the example playground.\n   */\n  private handleRunButtonClick() {\n    this.setOutputText('Waiting for remote server\u2026');\n\n    fetch('/play/compile', {\n      method: 'POST',\n      body: JSON.stringify({ body: this.getCodeWithModFile(), version: 2 }),\n    })\n      .then(res => res.json())\n      .then(async ({ Events, Errors }) => {\n        this.setOutputText(Errors || '');\n        for (const e of Events || []) {\n          this.appendToOutputText(e.Message);\n          await new Promise(resolve => setTimeout(resolve, e.Delay / 1000000));\n        }\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n}\n\nexport function initPlaygrounds(): void {\n  const exampleHashRegex = location.hash.match(/^#(example-.*)$/);\n  if (exampleHashRegex) {\n    const exampleHashEl = document.getElementById(exampleHashRegex[1]) as HTMLDetailsElement;\n    if (exampleHashEl) {\n      exampleHashEl.open = true;\n    }\n  }\n\n  // We use a spread operator to convert a nodelist into an array of elements.\n  const exampleHrefs = [\n    ...document.querySelectorAll<HTMLAnchorElement>(PlayExampleClassName.PLAY_HREF),\n  ];\n\n  /**\n   * Sometimes exampleHrefs and playContainers are in different order, so we\n   * find an exampleHref from a common hash.\n   * @param playContainer - playground container\n   */\n  const findExampleHash = (playContainer: PlaygroundExampleController) =>\n    exampleHrefs.find(ex => {\n      return ex.hash === playContainer.getAnchorHash();\n    });\n\n  for (const el of document.querySelectorAll(PlayExampleClassName.PLAY_CONTAINER)) {\n    // There should be the same amount of hrefs referencing examples as example containers.\n    const playContainer = new PlaygroundExampleController(el as HTMLDetailsElement);\n    const exampleHref = findExampleHash(playContainer);\n    if (exampleHref) {\n      exampleHref.addEventListener('click', () => {\n        playContainer.expand();\n      });\n    } else {\n      console.warn('example href not found');\n    }\n  }\n}\n", "/**\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\nimport { TreeNavController } from './tree.js';\n\nexport class SelectNavController {\n  constructor(private el: Element) {\n    this.el.addEventListener('change', e => {\n      const target = e.target as HTMLSelectElement;\n      let href = target.value;\n      if (!target.value.startsWith('/')) {\n        href = '/' + href;\n      }\n      window.location.href = href;\n    });\n  }\n}\n\nexport function makeSelectNav(tree: TreeNavController): HTMLLabelElement {\n  const label = document.createElement('label');\n  label.classList.add('go-Label');\n  label.setAttribute('aria-label', 'Menu');\n  const select = document.createElement('select');\n  select.classList.add('go-Select', 'js-selectNav');\n  label.appendChild(select);\n  const outline = document.createElement('optgroup');\n  outline.label = 'Outline';\n  select.appendChild(outline);\n  const groupMap: Record<string, HTMLOptGroupElement> = {};\n  let group: HTMLOptGroupElement;\n  for (const t of tree.treeitems) {\n    if (Number(t.depth) > 4) continue;\n    if (t.groupTreeitem) {\n      group = groupMap[t.groupTreeitem.label];\n      if (!group) {\n        group = groupMap[t.groupTreeitem.label] = document.createElement('optgroup');\n        group.label = t.groupTreeitem.label;\n        select.appendChild(group);\n      }\n    } else {\n      group = outline;\n    }\n    const o = document.createElement('option');\n    o.label = t.label;\n    o.textContent = t.label;\n    o.value = (t.el as HTMLAnchorElement).href.replace(window.location.origin, '').replace('/', '');\n    group.appendChild(o);\n  }\n  tree.addObserver(t => {\n    const hash = (t.el as HTMLAnchorElement).hash;\n    const value = select.querySelector<HTMLOptionElement>(`[value$=\"${hash}\"]`)?.value;\n    if (value) {\n      select.value = value;\n    }\n  }, 50);\n  return label;\n}\n", "/**\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * TreeNavController is the navigation tree component of the documentation page.\n * It adds accessiblity attributes to a tree, observes the heading elements\n * focus the topmost link for headings visible on the page, and implements the\n * WAI-ARIA Treeview Design Pattern with full\n * [keyboard support](https://www.w3.org/TR/wai-aria-practices/examples/treeview/treeview-2/treeview-2a.html#kbd_label).\n */\nexport class TreeNavController {\n  treeitems: TreeItem[];\n\n  /**\n   * firstChars is the first character of each treeitem in the same order\n   * as this.treeitems. We use this array to set focus by character when\n   * navigating the tree with a keyboard.\n   */\n  private firstChars: string[];\n  private firstTreeitem: TreeItem | null;\n  private lastTreeitem: TreeItem | null;\n  private observerCallbacks: ((t: TreeItem) => void)[];\n\n  constructor(private el: HTMLElement) {\n    this.treeitems = [];\n    this.firstChars = [];\n    this.firstTreeitem = null;\n    this.lastTreeitem = null;\n    this.observerCallbacks = [];\n    this.init();\n  }\n\n  private init(): void {\n    this.handleResize();\n    window.addEventListener('resize', this.handleResize);\n    this.findTreeItems();\n    this.updateVisibleTreeitems();\n    this.observeTargets();\n    if (this.firstTreeitem) {\n      this.firstTreeitem.el.tabIndex = 0;\n    }\n  }\n\n  private handleResize = (): void => {\n    this.el.style.setProperty('--js-tree-height', '100vh');\n    this.el.style.setProperty('--js-tree-height', this.el.clientHeight + 'px');\n  };\n\n  private observeTargets() {\n    this.addObserver(treeitem => {\n      this.expandTreeitem(treeitem);\n      this.setSelected(treeitem);\n      // TODO: Fix scroll issue in https://golang.org/issue/47450.\n      // treeitem.el.scrollIntoView({ block: 'nearest' });\n    });\n\n    const targets = new Map<string, boolean>();\n    const observer = new IntersectionObserver(\n      entries => {\n        for (const entry of entries) {\n          targets.set(entry.target.id, entry.isIntersecting || entry.intersectionRatio === 1);\n        }\n        for (const [id, isIntersecting] of targets) {\n          if (isIntersecting) {\n            const active = this.treeitems.find(t =>\n              (t.el as HTMLAnchorElement)?.href.endsWith(`#${id}`)\n            );\n            if (active) {\n              for (const fn of this.observerCallbacks) {\n                fn(active);\n              }\n            }\n            break;\n          }\n        }\n      },\n      {\n        threshold: 1.0,\n        rootMargin: '-60px 0px 0px 0px',\n      }\n    );\n\n    for (const href of this.treeitems.map(t => t.el.getAttribute('href'))) {\n      if (href) {\n        const id = href.replace(window.location.origin, '').replace('/', '').replace('#', '');\n        const target = document.getElementById(id);\n        if (target) {\n          observer.observe(target);\n        }\n      }\n    }\n  }\n\n  addObserver(fn: (t: TreeItem) => void, delay = 200): void {\n    this.observerCallbacks.push(debounce(fn, delay));\n  }\n\n  setFocusToNextItem(currentItem: TreeItem): void {\n    let nextItem = null;\n    for (let i = currentItem.index + 1; i < this.treeitems.length; i++) {\n      const ti = this.treeitems[i];\n      if (ti.isVisible) {\n        nextItem = ti;\n        break;\n      }\n    }\n    if (nextItem) {\n      this.setFocusToItem(nextItem);\n    }\n  }\n\n  setFocusToPreviousItem(currentItem: TreeItem): void {\n    let prevItem = null;\n    for (let i = currentItem.index - 1; i > -1; i--) {\n      const ti = this.treeitems[i];\n      if (ti.isVisible) {\n        prevItem = ti;\n        break;\n      }\n    }\n    if (prevItem) {\n      this.setFocusToItem(prevItem);\n    }\n  }\n\n  setFocusToParentItem(currentItem: TreeItem): void {\n    if (currentItem.groupTreeitem) {\n      this.setFocusToItem(currentItem.groupTreeitem);\n    }\n  }\n\n  setFocusToFirstItem(): void {\n    this.firstTreeitem && this.setFocusToItem(this.firstTreeitem);\n  }\n\n  setFocusToLastItem(): void {\n    this.lastTreeitem && this.setFocusToItem(this.lastTreeitem);\n  }\n\n  setSelected(currentItem: TreeItem): void {\n    for (const l1 of this.el.querySelectorAll('[aria-expanded=\"true\"]')) {\n      if (l1 === currentItem.el) continue;\n      if (!l1.nextElementSibling?.contains(currentItem.el)) {\n        l1.setAttribute('aria-expanded', 'false');\n      }\n    }\n    for (const l1 of this.el.querySelectorAll('[aria-selected]')) {\n      if (l1 !== currentItem.el) {\n        l1.setAttribute('aria-selected', 'false');\n      }\n    }\n    currentItem.el.setAttribute('aria-selected', 'true');\n    this.updateVisibleTreeitems();\n    this.setFocusToItem(currentItem, false);\n  }\n\n  expandTreeitem(treeitem: TreeItem): void {\n    let currentItem: TreeItem | null = treeitem;\n    while (currentItem) {\n      if (currentItem.isExpandable) {\n        currentItem.el.setAttribute('aria-expanded', 'true');\n      }\n      currentItem = currentItem.groupTreeitem;\n    }\n    this.updateVisibleTreeitems();\n  }\n\n  expandAllSiblingItems(currentItem: TreeItem): void {\n    for (const ti of this.treeitems) {\n      if (ti.groupTreeitem === currentItem.groupTreeitem && ti.isExpandable) {\n        this.expandTreeitem(ti);\n      }\n    }\n  }\n\n  collapseTreeitem(currentItem: TreeItem): void {\n    let groupTreeitem = null;\n\n    if (currentItem.isExpanded()) {\n      groupTreeitem = currentItem;\n    } else {\n      groupTreeitem = currentItem.groupTreeitem;\n    }\n\n    if (groupTreeitem) {\n      groupTreeitem.el.setAttribute('aria-expanded', 'false');\n      this.updateVisibleTreeitems();\n      this.setFocusToItem(groupTreeitem);\n    }\n  }\n\n  setFocusByFirstCharacter(currentItem: TreeItem, char: string): void {\n    let start: number, index: number;\n    char = char.toLowerCase();\n\n    // Get start index for search based on position of currentItem\n    start = currentItem.index + 1;\n    if (start === this.treeitems.length) {\n      start = 0;\n    }\n\n    // Check remaining slots in the menu\n    index = this.getIndexFirstChars(start, char);\n\n    // If not found in remaining slots, check from beginning\n    if (index === -1) {\n      index = this.getIndexFirstChars(0, char);\n    }\n\n    // If match was found...\n    if (index > -1) {\n      this.setFocusToItem(this.treeitems[index]);\n    }\n  }\n\n  private findTreeItems() {\n    const findItems = (el: HTMLElement, group: TreeItem | null) => {\n      let ti = group;\n      let curr = el.firstElementChild as HTMLElement;\n      while (curr) {\n        if (curr.tagName === 'A' || curr.tagName === 'SPAN') {\n          ti = new TreeItem(curr, this, group);\n          this.treeitems.push(ti);\n          this.firstChars.push(ti.label.substring(0, 1).toLowerCase());\n        }\n        if (curr.firstElementChild) {\n          findItems(curr, ti);\n        }\n        curr = curr.nextElementSibling as HTMLElement;\n      }\n    };\n    findItems(this.el as HTMLElement, null);\n    this.treeitems.map((ti, idx) => (ti.index = idx));\n  }\n\n  private updateVisibleTreeitems(): void {\n    this.firstTreeitem = this.treeitems[0];\n\n    for (const ti of this.treeitems) {\n      let parent = ti.groupTreeitem;\n      ti.isVisible = true;\n      while (parent && parent.el !== this.el) {\n        if (!parent.isExpanded()) {\n          ti.isVisible = false;\n        }\n        parent = parent.groupTreeitem;\n      }\n      if (ti.isVisible) {\n        this.lastTreeitem = ti;\n      }\n    }\n  }\n\n  private setFocusToItem(treeitem: TreeItem, focusEl = true) {\n    treeitem.el.tabIndex = 0;\n    if (focusEl) {\n      treeitem.el.focus();\n    }\n    for (const ti of this.treeitems) {\n      if (ti !== treeitem) {\n        ti.el.tabIndex = -1;\n      }\n    }\n  }\n\n  private getIndexFirstChars(startIndex: number, char: string): number {\n    for (let i = startIndex; i < this.firstChars.length; i++) {\n      if (this.treeitems[i].isVisible && char === this.firstChars[i]) {\n        return i;\n      }\n    }\n    return -1;\n  }\n}\n\nclass TreeItem {\n  el: HTMLElement;\n  groupTreeitem: TreeItem | null;\n  label: string;\n  isExpandable: boolean;\n  isVisible: boolean;\n  depth: number;\n  index: number;\n\n  private tree: TreeNavController;\n  private isInGroup: boolean;\n\n  constructor(el: HTMLElement, treeObj: TreeNavController, group: TreeItem | null) {\n    el.tabIndex = -1;\n    this.el = el;\n    this.groupTreeitem = group;\n    this.label = el.textContent?.trim() ?? '';\n    this.tree = treeObj;\n    this.depth = (group?.depth || 0) + 1;\n    this.index = 0;\n\n    const parent = el.parentElement;\n    if (parent?.tagName.toLowerCase() === 'li') {\n      parent?.setAttribute('role', 'none');\n    }\n    el.setAttribute('aria-level', this.depth + '');\n    if (el.getAttribute('aria-label')) {\n      this.label = el?.getAttribute('aria-label')?.trim() ?? '';\n    }\n\n    this.isExpandable = false;\n    this.isVisible = false;\n    this.isInGroup = !!group;\n\n    let curr = el.nextElementSibling;\n    while (curr) {\n      if (curr.tagName.toLowerCase() == 'ul') {\n        const groupId = `${group?.label ?? ''} nav group ${this.label}`.replace(/[\\W_]+/g, '_');\n        el.setAttribute('aria-owns', groupId);\n        el.setAttribute('aria-expanded', 'false');\n        curr.setAttribute('role', 'group');\n        curr.setAttribute('id', groupId);\n        this.isExpandable = true;\n        break;\n      }\n\n      curr = curr.nextElementSibling;\n    }\n    this.init();\n  }\n\n  private init() {\n    this.el.tabIndex = -1;\n    if (!this.el.getAttribute('role')) {\n      this.el.setAttribute('role', 'treeitem');\n    }\n    this.el.addEventListener('keydown', this.handleKeydown.bind(this));\n    this.el.addEventListener('click', this.handleClick.bind(this));\n    this.el.addEventListener('focus', this.handleFocus.bind(this));\n    this.el.addEventListener('blur', this.handleBlur.bind(this));\n  }\n\n  isExpanded() {\n    if (this.isExpandable) {\n      return this.el.getAttribute('aria-expanded') === 'true';\n    }\n\n    return false;\n  }\n\n  isSelected() {\n    return this.el.getAttribute('aria-selected') === 'true';\n  }\n\n  private handleClick(event: MouseEvent) {\n    // only process click events that directly happened on this treeitem\n    if (event.target !== this.el && event.target !== this.el.firstElementChild) {\n      return;\n    }\n    if (this.isExpandable) {\n      if (this.isExpanded() && this.isSelected()) {\n        this.tree.collapseTreeitem(this);\n      } else {\n        this.tree.expandTreeitem(this);\n      }\n      event.stopPropagation();\n    }\n    this.tree.setSelected(this);\n  }\n\n  private handleFocus() {\n    let el = this.el;\n    if (this.isExpandable) {\n      el = (el.firstElementChild as HTMLElement) ?? el;\n    }\n    el.classList.add('focus');\n  }\n\n  private handleBlur() {\n    let el = this.el;\n    if (this.isExpandable) {\n      el = (el.firstElementChild as HTMLElement) ?? el;\n    }\n    el.classList.remove('focus');\n  }\n\n  private handleKeydown(event: KeyboardEvent) {\n    if (event.altKey || event.ctrlKey || event.metaKey) {\n      return;\n    }\n\n    let captured = false;\n    switch (event.key) {\n      case ' ':\n      case 'Enter':\n        if (this.isExpandable) {\n          if (this.isExpanded() && this.isSelected()) {\n            this.tree.collapseTreeitem(this);\n          } else {\n            this.tree.expandTreeitem(this);\n          }\n          captured = true;\n        } else {\n          event.stopPropagation();\n        }\n        this.tree.setSelected(this);\n        break;\n\n      case 'ArrowUp':\n        this.tree.setFocusToPreviousItem(this);\n        captured = true;\n        break;\n\n      case 'ArrowDown':\n        this.tree.setFocusToNextItem(this);\n        captured = true;\n        break;\n\n      case 'ArrowRight':\n        if (this.isExpandable) {\n          if (this.isExpanded()) {\n            this.tree.setFocusToNextItem(this);\n          } else {\n            this.tree.expandTreeitem(this);\n          }\n        }\n        captured = true;\n        break;\n\n      case 'ArrowLeft':\n        if (this.isExpandable && this.isExpanded()) {\n          this.tree.collapseTreeitem(this);\n          captured = true;\n        } else {\n          if (this.isInGroup) {\n            this.tree.setFocusToParentItem(this);\n            captured = true;\n          }\n        }\n        break;\n\n      case 'Home':\n        this.tree.setFocusToFirstItem();\n        captured = true;\n        break;\n\n      case 'End':\n        this.tree.setFocusToLastItem();\n        captured = true;\n        break;\n\n      default:\n        if (event.key.length === 1 && event.key.match(/\\S/)) {\n          if (event.key == '*') {\n            this.tree.expandAllSiblingItems(this);\n          } else {\n            this.tree.setFocusByFirstCharacter(this, event.key);\n          }\n          captured = true;\n        }\n        break;\n    }\n\n    if (captured) {\n      event.stopPropagation();\n      event.preventDefault();\n    }\n  }\n}\n\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\nfunction debounce<T extends (...args: any[]) => any>(func: T, wait: number) {\n  let timeout: ReturnType<typeof setTimeout> | null;\n  return (...args: Parameters<T>) => {\n    const later = () => {\n      timeout = null;\n      func(...args);\n    };\n    if (timeout) {\n      clearTimeout(timeout);\n    }\n    timeout = setTimeout(later, wait);\n  };\n}\n", "/*!\n * @license\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * Controller for a table element with expandable rows. 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-  "names": ["PlayExampleClassName", "PlaygroundExampleController", "exampleEl", "_a", "_b", "_c", "_d", "e", "el", "numLineBreaks", "output", "err", "codeWithModFile", "moduleVars", "PLAYGROUND_BASE_URL", "res", "shareId", "href", "body", "Body", "Error", "Events", "Errors", "resolve", "initPlaygrounds", "exampleHashRegex", "exampleHashEl", "exampleHrefs", "findExampleHash", "playContainer", "ex", "exampleHref", "SelectNavController", "el", "e", "target", "href", "makeSelectNav", "tree", "label", "select", "outline", "groupMap", "group", "t", "o", "_a", "hash", "value", "TreeNavController", "el", "treeitem", "targets", "observer", "entries", "entry", "id", "isIntersecting", "active", "t", "_a", "fn", "href", "target", "delay", "debounce", "currentItem", "nextItem", "ti", "prevItem", "l1", "groupTreeitem", "char", "start", "index", "findItems", "group", "curr", "TreeItem", "idx", "parent", "focusEl", "startIndex", "treeObj", "_b", "_c", "_d", "_e", "groupId", "event", "captured", "func", "wait", "timeout", "args", "later", "ExpandableRowsTableController", "table", "toggleAll", "t", "a", "_a", "e", "target", "isExpanded", "rowIds", "id", "el", "initPlaygrounds", "directories", "table", "ExpandableRowsTableController", "treeEl", "treeCtrl", "TreeNavController", "select", "makeSelectNav", "mobileNav", "SelectNavController", "readme", "readmeContent", "readmeOutline", "readmeExpand", "readmeCollapse", "mobileNavSelect", "expandReadme", "e", "el", "openDeprecatedSymbol", "_a", "heading", "grandParent"]
+  "sourcesContent": ["/*!\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n// This file implements the playground implementation of the documentation\n// page. The playground involves a \"play\" button that allows you to open up\n// a new link to play.golang.org using the example code.\n\n// The CSS is in static/frontend/unit/main/_doc.css\n\n/**\n * CSS classes used by PlaygroundExampleController\n */\nconst PlayExampleClassName = {\n  PLAY_HREF: '.js-exampleHref',\n  PLAY_CONTAINER: '.js-exampleContainer',\n  EXAMPLE_INPUT: '.Documentation-exampleCode',\n  EXAMPLE_OUTPUT: '.Documentation-exampleOutput',\n  EXAMPLE_ERROR: '.Documentation-exampleError',\n  PLAY_BUTTON: '.Documentation-examplePlayButton',\n  SHARE_BUTTON: '.Documentation-exampleShareButton',\n  FORMAT_BUTTON: '.Documentation-exampleFormatButton',\n  RUN_BUTTON: '.Documentation-exampleRunButton',\n};\n\n/**\n * This controller enables playground examples to expand their dropdown or\n * generate shareable Go Playground URLs.\n */\nexport class PlaygroundExampleController {\n  /**\n   * The anchor tag used to identify the container with an example href.\n   * There is only one in an example container div.\n   */\n  private readonly anchorEl: HTMLAnchorElement | null;\n\n  /**\n   * The error element\n   */\n  private readonly errorEl: Element | null;\n\n  /**\n   * Buttons that redirect to an example's playground, this element\n   * only exists in executable examples.\n   */\n  private readonly playButtonEl: Element | null;\n  private readonly shareButtonEl: Element | null;\n\n  /**\n   * Button that formats the code in an example's playground.\n   */\n  private readonly formatButtonEl: Element | null;\n\n  /**\n   * Button that runs the code in an example's playground, this element\n   * only exists in executable examples.\n   */\n  private readonly runButtonEl: Element | null;\n\n  /**\n   * The executable code of an example.\n   */\n  private readonly inputEl: HTMLTextAreaElement | null;\n\n  /**\n   * The output of the given example code. This only exists if the\n   * author of the package provides an output for this example.\n   */\n  private readonly outputEl: Element | null;\n\n  /**\n   * @param exampleEl The div that contains playground content for the given example.\n   */\n  constructor(private readonly exampleEl: HTMLDetailsElement) {\n    this.exampleEl = exampleEl;\n    this.anchorEl = exampleEl.querySelector('a');\n    this.errorEl = exampleEl.querySelector(PlayExampleClassName.EXAMPLE_ERROR);\n    this.playButtonEl = exampleEl.querySelector(PlayExampleClassName.PLAY_BUTTON);\n    this.shareButtonEl = exampleEl.querySelector(PlayExampleClassName.SHARE_BUTTON);\n    this.formatButtonEl = exampleEl.querySelector(PlayExampleClassName.FORMAT_BUTTON);\n    this.runButtonEl = exampleEl.querySelector(PlayExampleClassName.RUN_BUTTON);\n    this.inputEl = this.makeTextArea(exampleEl.querySelector(PlayExampleClassName.EXAMPLE_INPUT));\n    this.outputEl = exampleEl.querySelector(PlayExampleClassName.EXAMPLE_OUTPUT);\n\n    // This is legacy listener to be replaced the listener for shareButtonEl.\n    this.playButtonEl?.addEventListener('click', () => this.handleShareButtonClick());\n    this.shareButtonEl?.addEventListener('click', () => this.handleShareButtonClick());\n    this.formatButtonEl?.addEventListener('click', () => this.handleFormatButtonClick());\n    this.runButtonEl?.addEventListener('click', () => this.handleRunButtonClick());\n\n    if (!this.inputEl) return;\n\n    this.resize();\n    this.inputEl.addEventListener('keyup', () => this.resize());\n    this.inputEl.addEventListener('keydown', e => this.onKeydown(e));\n  }\n\n  /**\n   * Replace the pre element with a textarea. The examples are initially rendered\n   * as pre elements so they're fully visible when JS is disabled.\n   */\n  makeTextArea(el: Element | null): HTMLTextAreaElement {\n    const t = document.createElement('textarea');\n    t.classList.add('Documentation-exampleCode', 'code');\n    t.spellcheck = false;\n    t.value = el?.textContent ?? '';\n    el?.parentElement?.replaceChild(t, el);\n    return t;\n  }\n\n  /**\n   * Retrieve the hash value of the anchor element.\n   */\n  getAnchorHash(): string | undefined {\n    return this.anchorEl?.hash;\n  }\n\n  /**\n   * Expands the current playground example.\n   */\n  expand(): void {\n    this.exampleEl.open = true;\n  }\n\n  /**\n   * Resizes the input element to accommodate the amount of text present.\n   */\n  private resize(): void {\n    if (this.inputEl?.value) {\n      const numLineBreaks = (this.inputEl.value.match(/\\n/g) || []).length;\n      // min-height + lines x line-height + padding + border\n      this.inputEl.style.height = `${(20 + numLineBreaks * 20 + 12 + 2) / 16}rem`;\n    }\n  }\n\n  /**\n   * Handler to override keyboard behavior in the playground's\n   * textarea element.\n   *\n   * Tab key inserts tabs into the example playground instead of\n   * switching to the next interactive element.\n   * @param e input element keyboard event.\n   */\n  private onKeydown(e: KeyboardEvent) {\n    if (e.key === 'Tab') {\n      document.execCommand('insertText', false, '\\t');\n      e.preventDefault();\n    }\n  }\n\n  /**\n   * Changes the text of the example's input box.\n   */\n  private setInputText(output: string) {\n    if (this.inputEl) {\n      this.inputEl.value = output;\n    }\n  }\n\n  /**\n   * Changes the text of the example's output box.\n   */\n  private setOutputText(output: string) {\n    if (this.outputEl) {\n      this.outputEl.textContent = output;\n    }\n  }\n\n  /**\n   * Appends to the text of the example's output box.\n   */\n  private appendToOutputText(output: string) {\n    if (this.outputEl) {\n      this.outputEl.textContent += output;\n    }\n  }\n\n  private setOutputHTML(output: string) {\n    if (this.outputEl) {\n      this.outputEl.innerHTML = output;\n    }\n  }\n\n  /**\n   * Sets the error message text and overwrites\n   * output box to indicate a failed response.\n   */\n  private setErrorText(err: string) {\n    if (this.errorEl) {\n      this.errorEl.textContent = err;\n    }\n    this.setOutputText('An error has occurred\u2026');\n  }\n\n  private getCodeWithModFile(): string {\n    let codeWithModFile = this.inputEl?.value ?? '';\n    const moduleVars = document.querySelector<HTMLDivElement>('.js-playgroundVars')?.dataset ?? {};\n    if (moduleVars.modulepath !== 'std') {\n      codeWithModFile = codeWithModFile.concat(`\n-- go.mod --\nmodule play.ground\n\nrequire ${moduleVars.modulepath} ${moduleVars.version}\n`);\n    }\n\n    return codeWithModFile;\n  }\n\n  /**\n   * Opens a new window to play.golang.org using the\n   * example snippet's code in the playground.\n   */\n  private handleShareButtonClick() {\n    const PLAYGROUND_BASE_URL = 'https://play.golang.org/p/';\n\n    this.setOutputText('Waiting for remote server\u2026');\n\n    fetch('/play/share', {\n      method: 'POST',\n      body: this.getCodeWithModFile(),\n    })\n      .then(res => res.text())\n      .then(shareId => {\n        const href = PLAYGROUND_BASE_URL + shareId;\n        this.setOutputHTML(`<a href=\"${href}\">${href}</a>`);\n        window.open(href);\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n\n  /**\n   * Runs gofmt on the example snippet in the playground.\n   */\n  private handleFormatButtonClick() {\n    this.setOutputText('Waiting for remote server\u2026');\n    const body = new FormData();\n    body.append('body', this.inputEl?.value ?? '');\n\n    fetch('/play/fmt', {\n      method: 'POST',\n      body: body,\n    })\n      .then(res => res.json())\n      .then(({ Body, Error }) => {\n        this.setOutputText(Error || 'Done.');\n        if (Body) {\n          this.setInputText(Body);\n          this.resize();\n        }\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n\n  /**\n   * Runs the code snippet in the example playground.\n   */\n  private handleRunButtonClick() {\n    this.setOutputText('Waiting for remote server\u2026');\n\n    fetch('/play/compile', {\n      method: 'POST',\n      body: JSON.stringify({ body: this.getCodeWithModFile(), version: 2 }),\n    })\n      .then(res => res.json())\n      .then(async ({ Events, Errors }) => {\n        this.setOutputText(Errors || '');\n        for (const e of Events || []) {\n          this.appendToOutputText(e.Message);\n          await new Promise(resolve => setTimeout(resolve, e.Delay / 1000000));\n        }\n      })\n      .catch(err => {\n        this.setErrorText(err);\n      });\n  }\n}\n\nexport function initPlaygrounds(): void {\n  const exampleHashRegex = location.hash.match(/^#(example-.*)$/);\n  if (exampleHashRegex) {\n    const exampleHashEl = document.getElementById(exampleHashRegex[1]) as HTMLDetailsElement;\n    if (exampleHashEl) {\n      exampleHashEl.open = true;\n    }\n  }\n\n  // We use a spread operator to convert a nodelist into an array of elements.\n  const exampleHrefs = [\n    ...document.querySelectorAll<HTMLAnchorElement>(PlayExampleClassName.PLAY_HREF),\n  ];\n\n  /**\n   * Sometimes exampleHrefs and playContainers are in different order, so we\n   * find an exampleHref from a common hash.\n   * @param playContainer - playground container\n   */\n  const findExampleHash = (playContainer: PlaygroundExampleController) =>\n    exampleHrefs.find(ex => {\n      return ex.hash === playContainer.getAnchorHash();\n    });\n\n  for (const el of document.querySelectorAll(PlayExampleClassName.PLAY_CONTAINER)) {\n    // There should be the same amount of hrefs referencing examples as example containers.\n    const playContainer = new PlaygroundExampleController(el as HTMLDetailsElement);\n    const exampleHref = findExampleHash(playContainer);\n    if (exampleHref) {\n      exampleHref.addEventListener('click', () => {\n        playContainer.expand();\n      });\n    } else {\n      console.warn('example href not found');\n    }\n  }\n}\n", "/**\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\nimport { TreeNavController } from './tree.js';\n\nexport class SelectNavController {\n  constructor(private el: Element) {\n    this.el.addEventListener('change', e => {\n      const target = e.target as HTMLSelectElement;\n      let href = target.value;\n      if (!target.value.startsWith('/')) {\n        href = '/' + href;\n      }\n      window.location.href = href;\n    });\n  }\n}\n\nexport function makeSelectNav(tree: TreeNavController): HTMLLabelElement {\n  const label = document.createElement('label');\n  label.classList.add('go-Label');\n  label.setAttribute('aria-label', 'Menu');\n  const select = document.createElement('select');\n  select.classList.add('go-Select', 'js-selectNav');\n  label.appendChild(select);\n  const outline = document.createElement('optgroup');\n  outline.label = 'Outline';\n  select.appendChild(outline);\n  const groupMap: Record<string, HTMLOptGroupElement> = {};\n  let group: HTMLOptGroupElement;\n  for (const t of tree.treeitems) {\n    if (Number(t.depth) > 4) continue;\n    if (t.groupTreeitem) {\n      group = groupMap[t.groupTreeitem.label];\n      if (!group) {\n        group = groupMap[t.groupTreeitem.label] = document.createElement('optgroup');\n        group.label = t.groupTreeitem.label;\n        select.appendChild(group);\n      }\n    } else {\n      group = outline;\n    }\n    const o = document.createElement('option');\n    o.label = t.label;\n    o.textContent = t.label;\n    o.value = (t.el as HTMLAnchorElement).href.replace(window.location.origin, '').replace('/', '');\n    group.appendChild(o);\n  }\n  tree.addObserver(t => {\n    const hash = (t.el as HTMLAnchorElement).hash;\n    const value = select.querySelector<HTMLOptionElement>(`[value$=\"${hash}\"]`)?.value;\n    if (value) {\n      select.value = value;\n    }\n  }, 50);\n  return label;\n}\n", "/**\n * @license\n * Copyright 2021 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * TreeNavController is the navigation tree component of the documentation page.\n * It adds accessiblity attributes to a tree, observes the heading elements\n * focus the topmost link for headings visible on the page, and implements the\n * WAI-ARIA Treeview Design Pattern with full\n * [keyboard support](https://www.w3.org/TR/wai-aria-practices/examples/treeview/treeview-2/treeview-2a.html#kbd_label).\n */\nexport class TreeNavController {\n  treeitems: TreeItem[];\n\n  /**\n   * firstChars is the first character of each treeitem in the same order\n   * as this.treeitems. We use this array to set focus by character when\n   * navigating the tree with a keyboard.\n   */\n  private firstChars: string[];\n  private firstTreeitem: TreeItem | null;\n  private lastTreeitem: TreeItem | null;\n  private observerCallbacks: ((t: TreeItem) => void)[];\n\n  constructor(private el: HTMLElement) {\n    this.treeitems = [];\n    this.firstChars = [];\n    this.firstTreeitem = null;\n    this.lastTreeitem = null;\n    this.observerCallbacks = [];\n    this.init();\n  }\n\n  private init(): void {\n    this.handleResize();\n    window.addEventListener('resize', this.handleResize);\n    this.findTreeItems();\n    this.updateVisibleTreeitems();\n    this.observeTargets();\n    if (this.firstTreeitem) {\n      this.firstTreeitem.el.tabIndex = 0;\n    }\n  }\n\n  private handleResize = (): void => {\n    this.el.style.setProperty('--js-tree-height', '100vh');\n    this.el.style.setProperty('--js-tree-height', this.el.clientHeight + 'px');\n  };\n\n  private observeTargets() {\n    this.addObserver(treeitem => {\n      this.expandTreeitem(treeitem);\n      this.setSelected(treeitem);\n      // TODO: Fix scroll issue in https://golang.org/issue/47450.\n      // treeitem.el.scrollIntoView({ block: 'nearest' });\n    });\n\n    const targets = new Map<string, boolean>();\n    const observer = new IntersectionObserver(\n      entries => {\n        for (const entry of entries) {\n          targets.set(entry.target.id, entry.isIntersecting || entry.intersectionRatio === 1);\n        }\n        for (const [id, isIntersecting] of targets) {\n          if (isIntersecting) {\n            const active = this.treeitems.find(t =>\n              (t.el as HTMLAnchorElement)?.href.endsWith(`#${id}`)\n            );\n            if (active) {\n              for (const fn of this.observerCallbacks) {\n                fn(active);\n              }\n            }\n            break;\n          }\n        }\n      },\n      {\n        threshold: 1.0,\n        rootMargin: '-60px 0px 0px 0px',\n      }\n    );\n\n    for (const href of this.treeitems.map(t => t.el.getAttribute('href'))) {\n      if (href) {\n        const id = href.replace(window.location.origin, '').replace('/', '').replace('#', '');\n        const target = document.getElementById(id);\n        if (target) {\n          observer.observe(target);\n        }\n      }\n    }\n  }\n\n  addObserver(fn: (t: TreeItem) => void, delay = 200): void {\n    this.observerCallbacks.push(debounce(fn, delay));\n  }\n\n  setFocusToNextItem(currentItem: TreeItem): void {\n    let nextItem = null;\n    for (let i = currentItem.index + 1; i < this.treeitems.length; i++) {\n      const ti = this.treeitems[i];\n      if (ti.isVisible) {\n        nextItem = ti;\n        break;\n      }\n    }\n    if (nextItem) {\n      this.setFocusToItem(nextItem);\n    }\n  }\n\n  setFocusToPreviousItem(currentItem: TreeItem): void {\n    let prevItem = null;\n    for (let i = currentItem.index - 1; i > -1; i--) {\n      const ti = this.treeitems[i];\n      if (ti.isVisible) {\n        prevItem = ti;\n        break;\n      }\n    }\n    if (prevItem) {\n      this.setFocusToItem(prevItem);\n    }\n  }\n\n  setFocusToParentItem(currentItem: TreeItem): void {\n    if (currentItem.groupTreeitem) {\n      this.setFocusToItem(currentItem.groupTreeitem);\n    }\n  }\n\n  setFocusToFirstItem(): void {\n    this.firstTreeitem && this.setFocusToItem(this.firstTreeitem);\n  }\n\n  setFocusToLastItem(): void {\n    this.lastTreeitem && this.setFocusToItem(this.lastTreeitem);\n  }\n\n  setSelected(currentItem: TreeItem): void {\n    for (const l1 of this.el.querySelectorAll('[aria-expanded=\"true\"]')) {\n      if (l1 === currentItem.el) continue;\n      if (!l1.nextElementSibling?.contains(currentItem.el)) {\n        l1.setAttribute('aria-expanded', 'false');\n      }\n    }\n    for (const l1 of this.el.querySelectorAll('[aria-selected]')) {\n      if (l1 !== currentItem.el) {\n        l1.setAttribute('aria-selected', 'false');\n      }\n    }\n    currentItem.el.setAttribute('aria-selected', 'true');\n    this.updateVisibleTreeitems();\n    this.setFocusToItem(currentItem, false);\n  }\n\n  expandTreeitem(treeitem: TreeItem): void {\n    let currentItem: TreeItem | null = treeitem;\n    while (currentItem) {\n      if (currentItem.isExpandable) {\n        currentItem.el.setAttribute('aria-expanded', 'true');\n      }\n      currentItem = currentItem.groupTreeitem;\n    }\n    this.updateVisibleTreeitems();\n  }\n\n  expandAllSiblingItems(currentItem: TreeItem): void {\n    for (const ti of this.treeitems) {\n      if (ti.groupTreeitem === currentItem.groupTreeitem && ti.isExpandable) {\n        this.expandTreeitem(ti);\n      }\n    }\n  }\n\n  collapseTreeitem(currentItem: TreeItem): void {\n    let groupTreeitem = null;\n\n    if (currentItem.isExpanded()) {\n      groupTreeitem = currentItem;\n    } else {\n      groupTreeitem = currentItem.groupTreeitem;\n    }\n\n    if (groupTreeitem) {\n      groupTreeitem.el.setAttribute('aria-expanded', 'false');\n      this.updateVisibleTreeitems();\n      this.setFocusToItem(groupTreeitem);\n    }\n  }\n\n  setFocusByFirstCharacter(currentItem: TreeItem, char: string): void {\n    let start: number, index: number;\n    char = char.toLowerCase();\n\n    // Get start index for search based on position of currentItem\n    start = currentItem.index + 1;\n    if (start === this.treeitems.length) {\n      start = 0;\n    }\n\n    // Check remaining slots in the menu\n    index = this.getIndexFirstChars(start, char);\n\n    // If not found in remaining slots, check from beginning\n    if (index === -1) {\n      index = this.getIndexFirstChars(0, char);\n    }\n\n    // If match was found...\n    if (index > -1) {\n      this.setFocusToItem(this.treeitems[index]);\n    }\n  }\n\n  private findTreeItems() {\n    const findItems = (el: HTMLElement, group: TreeItem | null) => {\n      let ti = group;\n      let curr = el.firstElementChild as HTMLElement;\n      while (curr) {\n        if (curr.tagName === 'A' || curr.tagName === 'SPAN') {\n          ti = new TreeItem(curr, this, group);\n          this.treeitems.push(ti);\n          this.firstChars.push(ti.label.substring(0, 1).toLowerCase());\n        }\n        if (curr.firstElementChild) {\n          findItems(curr, ti);\n        }\n        curr = curr.nextElementSibling as HTMLElement;\n      }\n    };\n    findItems(this.el as HTMLElement, null);\n    this.treeitems.map((ti, idx) => (ti.index = idx));\n  }\n\n  private updateVisibleTreeitems(): void {\n    this.firstTreeitem = this.treeitems[0];\n\n    for (const ti of this.treeitems) {\n      let parent = ti.groupTreeitem;\n      ti.isVisible = true;\n      while (parent && parent.el !== this.el) {\n        if (!parent.isExpanded()) {\n          ti.isVisible = false;\n        }\n        parent = parent.groupTreeitem;\n      }\n      if (ti.isVisible) {\n        this.lastTreeitem = ti;\n      }\n    }\n  }\n\n  private setFocusToItem(treeitem: TreeItem, focusEl = true) {\n    treeitem.el.tabIndex = 0;\n    if (focusEl) {\n      treeitem.el.focus();\n    }\n    for (const ti of this.treeitems) {\n      if (ti !== treeitem) {\n        ti.el.tabIndex = -1;\n      }\n    }\n  }\n\n  private getIndexFirstChars(startIndex: number, char: string): number {\n    for (let i = startIndex; i < this.firstChars.length; i++) {\n      if (this.treeitems[i].isVisible && char === this.firstChars[i]) {\n        return i;\n      }\n    }\n    return -1;\n  }\n}\n\nclass TreeItem {\n  el: HTMLElement;\n  groupTreeitem: TreeItem | null;\n  label: string;\n  isExpandable: boolean;\n  isVisible: boolean;\n  depth: number;\n  index: number;\n\n  private tree: TreeNavController;\n  private isInGroup: boolean;\n\n  constructor(el: HTMLElement, treeObj: TreeNavController, group: TreeItem | null) {\n    el.tabIndex = -1;\n    this.el = el;\n    this.groupTreeitem = group;\n    this.label = el.textContent?.trim() ?? '';\n    this.tree = treeObj;\n    this.depth = (group?.depth || 0) + 1;\n    this.index = 0;\n\n    const parent = el.parentElement;\n    if (parent?.tagName.toLowerCase() === 'li') {\n      parent?.setAttribute('role', 'none');\n    }\n    el.setAttribute('aria-level', this.depth + '');\n    if (el.getAttribute('aria-label')) {\n      this.label = el?.getAttribute('aria-label')?.trim() ?? '';\n    }\n\n    this.isExpandable = false;\n    this.isVisible = false;\n    this.isInGroup = !!group;\n\n    let curr = el.nextElementSibling;\n    while (curr) {\n      if (curr.tagName.toLowerCase() == 'ul') {\n        const groupId = `${group?.label ?? 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All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * Controller for a table element with expandable rows. Adds event listeners to\n * a toggle within a table row that controls visiblity of additional related\n * rows in the table.\n *\n * @example\n * ```typescript\n * import {ExpandableRowsTableController} from '/static/js/table';\n *\n * const el = document .querySelector<HTMLTableElement>('.js-myTableElement')\n * new ExpandableRowsTableController(el));\n * ```\n */\nexport class ExpandableRowsTableController {\n  private rows: HTMLTableRowElement[];\n  private toggles: HTMLButtonElement[];\n\n  /**\n   * Create a table controller.\n   * @param table - The table element to which the controller binds.\n   */\n  constructor(private table: HTMLTableElement, private toggleAll?: HTMLButtonElement | null) {\n    this.rows = Array.from(table.querySelectorAll<HTMLTableRowElement>('[data-aria-controls]'));\n    this.toggles = Array.from(this.table.querySelectorAll('[aria-expanded]'));\n    this.setAttributes();\n    this.attachEventListeners();\n    this.update();\n  }\n\n  /**\n   * setAttributes sets data-aria-* and data-id attributes to regular\n   * html attributes as a workaround for limitations from safehtml.\n   */\n  private setAttributes() {\n    for (const a of ['data-aria-controls', 'data-aria-labelledby', 'data-id']) {\n      this.table.querySelectorAll(`[${a}]`).forEach(t => {\n        t.setAttribute(a.replace('data-', ''), t.getAttribute(a) ?? 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'false' : 'true');\n    e.stopPropagation();\n    this.update();\n  }\n\n  expandAllItems = (): void => {\n    this.toggles.map(t => t.setAttribute('aria-expanded', 'true'));\n    this.update();\n  };\n\n  private collapseAllItems = () => {\n    this.toggles.map(t => t.setAttribute('aria-expanded', 'false'));\n    this.update();\n  };\n\n  private update = () => {\n    this.updateVisibleItems();\n    setTimeout(() => this.updateGlobalToggle());\n  };\n\n  private updateVisibleItems() {\n    this.rows.map(t => {\n      const isExpanded = t?.getAttribute('aria-expanded') === 'true';\n      const rowIds = t?.getAttribute('aria-controls')?.trimEnd().split(' ');\n      rowIds?.map(id => {\n        const target = document.getElementById(`${id}`);\n        if (isExpanded) {\n          target?.classList.add('visible');\n          target?.classList.remove('hidden');\n        } else {\n          target?.classList.add('hidden');\n          target?.classList.remove('visible');\n        }\n      });\n    });\n  }\n\n  private updateGlobalToggle() {\n    if (!this.toggleAll) return;\n    if (this.rows.some(t => t.hasAttribute('aria-expanded'))) {\n      this.toggleAll.style.display = 'block';\n    }\n    const someCollapsed = this.toggles.some(el => el.getAttribute('aria-expanded') === 'false');\n    if (someCollapsed) {\n      this.toggleAll.innerText = 'Expand all';\n      this.toggleAll.onclick = this.expandAllItems;\n    } else {\n      this.toggleAll.innerText = 'Collapse all';\n      this.toggleAll.onclick = this.collapseAllItems;\n    }\n  }\n}\n", "import { initPlaygrounds } from 'static/shared/playground/playground';\nimport { SelectNavController, makeSelectNav } from 'static/shared/outline/select';\nimport { TreeNavController } from 'static/shared/outline/tree';\nimport { ExpandableRowsTableController } from 'static/shared/table/table';\n\ninitPlaygrounds();\n\nconst directories = document.querySelector<HTMLTableElement>('.js-expandableTable');\nif (directories) {\n  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This will expand\n * deprecated symbols when they are navigated to from the index\n * or a direct link.\n */\nfunction openDeprecatedSymbol() {\n  if (!location.hash) return;\n  const heading = document.getElementById(location.hash.slice(1));\n  const grandParent = heading?.parentElement?.parentElement as HTMLDetailsElement | null;\n  if (grandParent?.nodeName === 'DETAILS') {\n    grandParent.open = true;\n  }\n}\nopenDeprecatedSymbol();\nwindow.addEventListener('hashchange', () => openDeprecatedSymbol());\n\n/**\n * Listen for changes in the build context dropdown.\n */\ndocument.querySelectorAll('.js-buildContextSelect').forEach(el => {\n  el.addEventListener('change', e => {\n    window.location.search = `?GOOS=${(e.target as HTMLSelectElement).value}`;\n  });\n});\n"],
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pre{font-family:monospace,monospace;font-size:1em}.Overview-readmeContent hr{box-sizing:initial;height:0;overflow:visible}.Overview-readmeContent input{font:inherit;margin:0}.Overview-readmeContent input{overflow:visible}.Overview-readmeContent [type=checkbox]{box-sizing:border-box;padding:0}.Overview-readmeContent *{box-sizing:border-box}.Overview-readmeContent input{font-family:inherit;font-size:inherit;line-height:inherit}.Overview-readmeContent a{color:var(--color-brand-primary);text-decoration:none}.Overview-readmeContent a:hover{text-decoration:underline}.Overview-readmeContent strong{font-weight:600}.Overview-readmeContent hr{height:0;margin:.9375rem 0;overflow:hidden;background:transparent;border:0;border-bottom:var(--border)}.Overview-readmeContent hr:after,.Overview-readmeContent hr:before{display:table;content:""}.Overview-readmeContent hr:after{clear:both}.Overview-readmeContent table{border-spacing:0;border-collapse:collapse}.Overview-readmeContent td,.Overview-readmeContent th{padding:0}.Overview-readmeContent details summary{cursor:pointer}.Overview-readmeContent kbd{display:inline-block;padding:.1875rem .3125rem;font:.6875rem SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;line-height:.625rem;color:#444d56;vertical-align:middle;background-color:var(--color-background-accented);border:var(--border);border-radius:.1875rem;box-shadow:inset 0 -.0625rem 0 var(--border)}.Overview-readmeContent h3,.Overview-readmeContent h4,.Overview-readmeContent h5,.Overview-readmeContent h6,.Overview-readmeContent div[aria-level="7"],.Overview-readmeContent div[aria-level="8"]{margin-top:0;margin-bottom:0}.Overview-readmeContent h3{font-size:2rem}.Overview-readmeContent h3,.Overview-readmeContent h4{font-weight:600}.Overview-readmeContent h4{font-size:1.5rem}.Overview-readmeContent h5{font-size:1.25rem}.Overview-readmeContent h5,.Overview-readmeContent h6{font-weight:600}.Overview-readmeContent h6{font-size:1rem}.Overview-readmeContent div[aria-level="7"]{font-size:.875rem}.Overview-readmeContent div[aria-level="7"],.Overview-readmeContent div[aria-level="8"]{font-weight:600}.Overview-readmeContent div[aria-level="8"]{font-size:.75rem}.Overview-readmeContent p{margin-top:0;margin-bottom:.625rem}.Overview-readmeContent blockquote{margin:0}.Overview-readmeContent ol,.Overview-readmeContent ul{padding-left:0;margin-top:0;margin-bottom:0}.Overview-readmeContent ol ol,.Overview-readmeContent ul ol{list-style-type:lower-roman}.Overview-readmeContent ol ol ol,.Overview-readmeContent ol ul ol,.Overview-readmeContent ul ol ol,.Overview-readmeContent ul ul ol{list-style-type:lower-alpha}.Overview-readmeContent dd{margin-left:0}.Overview-readmeContent code,.Overview-readmeContent pre{font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:.75rem}.Overview-readmeContent pre{margin-top:0;margin-bottom:0}.Overview-readmeContent input::-webkit-inner-spin-button,.Overview-readmeContent input::-webkit-outer-spin-button{margin:0;-webkit-appearance:none;appearance:none}.Overview-readmeContent :checked+.radio-label{position:relative;z-index:1;border-color:var(--color-brand-primary)}.Overview-readmeContent hr{border-bottom-color:var(--color-border)}.Overview-readmeContent kbd{display:inline-block;padding:.1875rem .3125rem;font:.6875rem SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;line-height:.625rem;color:#444d56;vertical-align:middle;background-color:var(--color-background-accented);border:var(--border);border-radius:.1875rem;box-shadow:inset 0 -.0625rem 0 var(--color-border)}.Overview-readmeContent a:not([href]){color:inherit;text-decoration:none}.Overview-readmeContent blockquote,.Overview-readmeContent details,.Overview-readmeContent dl,.Overview-readmeContent ol,.Overview-readmeContent p,.Overview-readmeContent pre,.Overview-readmeContent table,.Overview-readmeContent ul{margin-top:0;margin-bottom:1rem}.Overview-readmeContent hr{height:.25em;padding:0;margin:1.5rem 0;background-color:var(--color-border);border:0}.Overview-readmeContent blockquote{padding:0 1em;color:var(--color-text-subtle);border-left:.25em solid var(--color-border)}.Overview-readmeContent blockquote>:first-child{margin-top:0}.Overview-readmeContent blockquote>:last-child{margin-bottom:0}.Overview-readmeContent h3,.Overview-readmeContent h4,.Overview-readmeContent h5,.Overview-readmeContent h6,.Overview-readmeContent div[aria-level="7"],.Overview-readmeContent div[aria-level="8"]{margin-top:1.5rem;margin-bottom:1rem;font-weight:600;line-height:1.25}.Overview-readmeContent h3{font-size:2em}.Overview-readmeContent h3,.Overview-readmeContent h4{padding-bottom:.3em;border-bottom:var(--border)}.Overview-readmeContent h4{font-size:1.5em}.Overview-readmeContent h5{font-size:1.25em}.Overview-readmeContent h6{font-size:1em}.Overview-readmeContent div[aria-level="7"]{font-size:.875em}.Overview-readmeContent div[aria-level="8"]{font-size:.85em;color:var(--color-text-subtle)}.Overview-readmeContent ol,.Overview-readmeContent ul{padding-left:2em}.Overview-readmeContent ol ol,.Overview-readmeContent ol ul,.Overview-readmeContent ul ol,.Overview-readmeContent ul ul{margin-top:0;margin-bottom:0}.Overview-readmeContent li{word-wrap:break-all}.Overview-readmeContent li>p{margin-top:1rem}.Overview-readmeContent li+li{margin-top:.25em}.Overview-readmeContent dl{padding:0}.Overview-readmeContent dl dt{padding:0;margin-top:1rem;font-size:1em;font-style:italic;font-weight:600}.Overview-readmeContent dl dd{padding:0 1rem;margin-bottom:1rem}.Overview-readmeContent table{display:block;width:100%;overflow:auto}.Overview-readmeContent table th{font-weight:600}.Overview-readmeContent table td,.Overview-readmeContent table th{padding:.375rem .8125rem;border:var(--border)}.Overview-readmeContent table tr{background-color:var(--color-background);border-top:var(--border)}.Overview-readmeContent table tr:nth-child(2n){background-color:var(--color-background-accented)}.Overview-readmeContent img{max-width:100%;box-sizing:initial;background-color:var(--color-background)}.Overview-readmeContent img[align=right]{padding-left:1.25rem}.Overview-readmeContent img[align=left]{padding-right:1.25rem}.Overview-readmeContent code{padding:.2em .4em;margin:0;font-size:85%;background-color:var(--color-background-accented);border-radius:.1875rem}.Overview-readmeContent pre{word-wrap:normal}.Overview-readmeContent pre>code{padding:0;margin:0;font-size:100%;word-break:normal;white-space:pre;background:transparent;border:0}.Overview-readmeContent pre{padding:1rem;overflow:auto;font-size:85%;line-height:1.45;background-color:var(--color-background-accented);border-radius:.1875rem}.Overview-readmeContent pre code{display:inline;max-width:auto;padding:0;margin:0;overflow:visible;line-height:inherit;word-wrap:normal;background-color:initial;border:0}.UnitReadme{margin-bottom:2rem}.UnitReadme ul,.UnitReadme ol{list-style:circle}.UnitReadme h2 a.UnitReadme-idLink,.UnitReadme summary a{opacity:0}.UnitReadme h2:hover a,.UnitReadme summary:focus a{opacity:1}.UnitReadme-title{border-bottom:var(--border);font-size:1.375rem;padding-bottom:1rem}.UnitReadme-title img{margin:auto 1rem auto 0}.UnitReadme-content{-webkit-mask-image:linear-gradient(to bottom,black 75%,transparent 100%);mask-image:linear-gradient(to bottom,black 75%,transparent 100%);max-height:20rem;overflow:hidden;position:relative}.UnitReadme-content ul{line-height:1.5rem}.UnitReadme-expandLink{background:none;border:none;color:var(--color-brand-primary);cursor:pointer;padding:0}.UnitReadme-collapseLink{background:none;border:none;color:var(--color-brand-primary);cursor:pointer;display:none;padding:0}.UnitReadme--expanded .UnitReadme-content{-webkit-mask-image:none;mask-image:none;max-height:initial;overflow:initial}.UnitReadme--toggle .UnitReadme-expandLink{display:block}.UnitReadme--expanded .UnitReadme-expandLink{display:none}.UnitReadme--expanded.UnitReadme--toggle .UnitReadme-collapseLink{display:block}.Overview-readmeContent{overflow-wrap:break-word}.UnitDetails{column-gap:2rem;display:grid;grid-template-columns:minmax(0,auto);margin:auto;min-height:32rem}@media only screen and (min-width: 64rem){.UnitDetails{grid-template-columns:15.5rem minmax(30.5rem,43.125rem) minmax(10rem,15.5rem)}}@media only screen and (min-width: 80rem){.UnitDetails{grid-template-columns:15.5rem minmax(43.125rem,60rem) 15.5rem;justify-content:center}}.UnitDetails :target{scroll-margin-top:calc(var(--js-sticky-header-height, 3.5rem) * 2.15)}@media only screen and (min-width: 64rem){.UnitDetails :target{scroll-margin-top:calc(var(--js-sticky-header-height, 3.5rem) * 1.25)}}.UnitDetails :target:not(details,h2){background-color:var(--color-background-highlighted);padding:.25rem}.UnitDetails-meta{order:-1}@media only screen and (min-width: 64rem){.UnitDetails-meta{display:block;margin-top:2rem;order:initial}}.UnitDetails-contentEmpty{align-items:center;background-color:var(--color-background-accented);color:var(--color-text-subtle);display:flex;flex-direction:column;height:15rem;padding-top:1rem;text-align:center}.UnitDetails-contentEmpty img{height:7.8125rem;width:auto}
 /*!
 * Copyright 2019-2020 The Go Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style
diff --git a/static/frontend/unit/main/main.min.css.map b/static/frontend/unit/main/main.min.css.map
index 9137adb..9c31b25 100644
--- a/static/frontend/unit/main/main.min.css.map
+++ b/static/frontend/unit/main/main.min.css.map
@@ -1,7 +1,7 @@
 {
   "version": 3,
   "sources": ["_build-context.css", "_directories.css", "_doc.css", "_files.css", "_meta.css", "_outline.css", "_readme_gen.css", "_readme.css", "main.css"],
-  "sourcesContent": ["/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitBuildContext-titleContext label,\n.UnitBuildContext-singleContext {\n  color: var(--color-text-subtle);\n  font-size: 0.875rem;\n}\n\n.UnitBuildContext-singleContext {\n  padding: 0.35rem 0;\n}\n\n.UnitBuildContext-titleContext select {\n  border-color: var(--color-border);\n  color: var(--color-text-subtle);\n  margin-left: 0.25rem;\n  min-width: 6rem;\n}\n\n.UnitBuildContext-titleContext option {\n  color: var(--color-text-subtle);\n}\n\n.UnitBuildContext-link {\n  display: none;\n}\n@media only screen and (min-width: 30rem) {\n  .UnitBuildContext-link {\n    display: initial;\n  }\n}\n\n.UnitDoc .UnitBuildContext-titleContext {\n  position: relative;\n}\n\n.UnitDoc .UnitBuildContext-titleContext label,\n.UnitDoc .UnitBuildContext-singleContext {\n  bottom: 0.875rem;\n  position: absolute;\n  right: 0;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitDirectories {\n  margin-bottom: 2rem;\n}\n\n.UnitDirectories h2 a.UnitDirectories-idLink,\n.UnitDirectories summary a {\n  opacity: 0;\n}\n\n.UnitDirectories h2:hover a,\n.UnitDirectories summary:focus a {\n  opacity: 1;\n}\n\n.UnitDirectories-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  margin: 0.5rem 0 0;\n  padding-bottom: 1rem;\n}\n\n.UnitDirectories-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitDirectories-table {\n  border-collapse: collapse;\n  height: 0;\n  table-layout: auto;\n  width: 100%;\n}\n\n.UnitDirectories-table--tree {\n  margin-top: -2rem;\n}\n\n.UnitDirectories-tableHeader {\n  background-color: var(--color-background-accented);\n}\n\n.UnitDirectories-tableHeader--tree {\n  visibility: hidden;\n}\n\n.UnitDirectories td {\n  border-bottom: var(--border);\n  max-width: 32rem;\n  min-width: 12rem;\n  padding: 0.25rem 1rem;\n  vertical-align: middle;\n  word-break: break-word;\n}\n\n.UnitDirectories th {\n  padding: 0.5rem 1rem;\n  text-align: left;\n}\n\n.UnitDirectories tr.hidden {\n  display: none;\n}\n\n.UnitDirectories tr[aria-controls] {\n  cursor: pointer;\n}\n\n.UnitDirectories tr[aria-controls]:hover {\n  background-color: var(--color-background-accented);\n}\n\n.UnitDirectories th.UnitDirectories-toggleHead {\n  font-size: 0;\n  max-width: 0.625rem;\n  padding: 0;\n  width: 0.625rem;\n}\n\n.UnitDirectories td.UnitDirectories-toggleCell,\nth.UnitDirectories-toggleCell {\n  background-color: var(--background);\n  border: var(--white);\n  max-width: 0.625rem;\n  padding: 0;\n  width: 0.625rem;\n}\n\n.UnitDirectories-toggleButton {\n  font-size: 1.25rem;\n  left: -0.75rem;\n  margin: 0 0 -1rem -0.875rem;\n  padding: 0;\n  position: absolute;\n  vertical-align: top;\n}\n\n.UnitDirectories-subSpacer {\n  border-right: var(--border);\n  display: inline;\n  margin-right: 0.875rem;\n  width: 0.0625rem;\n}\n\n.UnitDirectories-toggleButton[aria-expanded='true'] img {\n  transform: rotate(90deg);\n}\n\n.UnitDirectories-pathCell {\n  align-items: flex-start;\n  display: flex;\n  flex-direction: column;\n  line-height: 1.75rem;\n  word-break: break-all;\n}\n\n.UnitDirectories-pathCell > div {\n  position: relative;\n}\n\n.UnitDirectories-subdirectory {\n  border-left: var(--border);\n  display: flex;\n  flex-direction: column;\n  margin-left: 0.375rem;\n  padding: 0.5rem 1rem;\n}\n\n.UnitDirectories-mobileSynopsis {\n  display: none;\n  line-height: 1.25rem;\n  margin-top: 0.25rem;\n  word-break: keep-all;\n}\n@media only screen and (max-width: 52rem) {\n  .UnitDirectories-mobileSynopsis {\n    display: initial;\n  }\n\n  .UnitDirectories-table th.UnitDirectories-desktopSynopsis,\n  .UnitDirectories-table td.UnitDirectories-desktopSynopsis {\n    display: none;\n  }\n}\n\n.UnitDirectories-expandButton {\n  position: relative;\n}\n\n.UnitDirectories-expandButton button {\n  background-color: transparent;\n  border: none;\n  bottom: 1rem;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  display: none;\n  font-size: 0.875rem;\n  position: absolute;\n  right: 0;\n  text-decoration: none;\n}\n\n.UnitDirectories-badge {\n  border: 0.0625rem solid var(--color-text-subtle);\n  border-radius: 0.125rem;\n  font-size: 0.6875rem;\n  font-weight: 500;\n  line-height: 1rem;\n  margin-left: 0.5rem;\n  margin-top: 0.125rem;\n  padding: 0 0.35rem;\n  text-align: center;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/* stylelint-disable no-descending-specificity */\n.UnitDoc {\n  margin-bottom: 2rem;\n  word-break: break-word;\n}\n\n.UnitDoc h2 a.UnitDoc-idLink,\n.UnitDoc summary a {\n  opacity: 0;\n}\n\n.UnitDoc h2:hover a,\n.UnitDoc summary:focus a {\n  opacity: 1;\n}\n\n.UnitDoc-title {\n  border-bottom: var(--border);\n  padding-bottom: 1rem;\n}\n\n.UnitDoc-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitDoc-emptySection {\n  background-color: var(--color-background-accented);\n  color: var(--color-text-subtle);\n  height: 12.25rem;\n  margin-top: 1.5rem;\n  text-align: center;\n}\n\n.UnitDoc-emptySection img {\n  height: 7.8125rem;\n  width: auto;\n}\n\n.Documentation .UnitDoc-emptySection p {\n  margin: 1rem auto;\n}\n\n.UnitDoc .Documentation h4 {\n  margin-top: 1.5rem;\n}\n\n.Documentation {\n  display: block;\n}\n\n.Documentation p {\n  margin: 1rem 0;\n}\n\n.Documentation h2,\n.Documentation h3 {\n  margin-top: 1.5rem;\n}\n\n.Documentation a {\n  text-decoration: none;\n}\n\n.Documentation a:hover {\n  text-decoration: underline;\n}\n\n.Documentation h2 a,\n.Documentation h3 a,\n.Documentation h4 a.Documentation-idLink,\n.Documentation summary a {\n  opacity: 0;\n}\n\n.Documentation a:focus {\n  opacity: 1;\n}\n\n.Documentation h3 a.Documentation-source {\n  opacity: 1;\n}\n\n.Documentation h2:hover a,\n.Documentation h3:hover a,\n.Documentation h4:hover a,\n.Documentation summary:hover a,\n.Documentation summary:focus a {\n  opacity: 1;\n}\n\n.Documentation ul {\n  line-height: 1.5rem;\n  list-style: none;\n  padding-left: 0;\n}\n\n.Documentation ul ul {\n  padding-left: 2em;\n}\n\n.Documentation .Documentation-bulletList {\n  list-style: disc;\n  margin-bottom: 1rem;\n  padding-left: 2rem;\n}\n\n.Documentation .Documentation-numberList {\n  list-style: decimal;\n  margin-bottom: 1rem;\n  padding-left: 2rem;\n}\n\n.Documentation pre + pre {\n  margin-top: 0.625rem;\n}\n\n.Documentation .Documentation-declarationLink + pre {\n  border-radius: 0 0 0.3em 0.3em;\n  border-top: var(--border);\n  margin-top: 0;\n}\n\n.Documentation pre .comment {\n  color: var(--color-code-comment);\n}\n\n.Documentation-toc,\n.Documentation-overview,\n.Documentation-index,\n.Documentation-examples {\n  padding-bottom: 0;\n}\n\n.Documentation-empty {\n  color: var(--color-text-subtle);\n  margin-top: -0.5rem;\n}\n@media only screen and (min-width: 64rem) {\n  .Documentation-toc {\n    margin-left: 2rem;\n    white-space: nowrap;\n  }\n\n  .Documentation-toc-columns {\n    columns: 2;\n  }\n}\n\n.Documentation-toc:empty {\n  display: none;\n}\n\n.Documentation-tocItem {\n  overflow: hidden;\n  text-overflow: ellipsis;\n}\n\n.Documentation-tocItem--constants,\n.Documentation-tocItem--funcsAndTypes,\n.Documentation-tocItem--functions,\n.Documentation-tocItem--types,\n.Documentation-tocItem--variables,\n.Documentation-tocItem--notes {\n  display: none;\n}\n\n.Documentation-overviewHeader,\n.Documentation-indexHeader,\n.Documentation-constantsHeader,\n.Documentation-variablesHeader,\n.Documentation-examplesHeader,\n.Documentation-filesHeader,\n.Documentation-functionHeader,\n.Documentation-typeHeader,\n.Documentation-typeMethodHeader,\n.Documentation-typeFuncHeader {\n  margin-bottom: 0.5rem;\n}\n\n.Documentation-function h4,\n.Documentation-type h4,\n.Documentation-typeFunc h4,\n.Documentation-typeMethod h4 {\n  align-items: baseline;\n  display: flex;\n  justify-content: space-between;\n}\n\n.Documentation-sinceVersion {\n  color: var(--color-text-subtle);\n  font-size: 0.9375rem;\n  font-weight: 400;\n}\n\n.Documentation-constants br:last-of-type,\n.Documentation-variables br:last-of-type {\n  display: none;\n}\n\n.Documentation-build {\n  color: var(--color-text-subtle);\n  padding-top: 1.5rem;\n  text-align: right;\n}\n\n.Documentation-declaration pre {\n  scroll-padding-top: calc(var(--js-sticky-header-height, 3.5rem) + 3.75rem);\n}\n@media only screen and (min-width: 64rem) {\n  .Documentation-declaration pre {\n    scroll-padding-top: calc(var(--js-sticky-header-height, 3.5rem) + 0.75rem);\n  }\n}\n\n.Documentation-declaration + .Documentation-declaration {\n  margin-top: 0.625rem;\n}\n\n.Documentation-declarationLink {\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-bottom: none;\n  border-radius: 0.3em 0.3em 0 0;\n  display: block;\n  font-size: 0.75rem;\n  line-height: 0.5rem;\n  padding: 0.375rem;\n  text-align: right;\n}\n\n.Documentation-exampleButtonsContainer {\n  align-items: center;\n  display: flex;\n  justify-content: flex-end;\n  margin-top: 0.5rem;\n}\n\n.Documentation-examplePlayButton {\n  background-color: var(--white);\n  border: 0.15rem solid var(--turq-med);\n  color: var(--turq-med);\n  cursor: pointer;\n  flex-shrink: 0;\n  height: 2.5rem;\n  width: 4.125rem;\n}\n\n.Documentation-exampleRunButton,\n.Documentation-exampleShareButton,\n.Documentation-exampleFormatButton {\n  border: 0.0625rem solid var(--turq-dark);\n  border-radius: 0.25rem;\n  cursor: pointer;\n  height: 2rem;\n  margin-left: 0.5rem;\n  padding: 0 1rem;\n}\n\n.Documentation-exampleRunButton {\n  background-color: var(--turq-dark);\n  color: var(--white);\n}\n\n.Documentation-exampleShareButton,\n.Documentation-exampleFormatButton {\n  background-color: var(--white);\n  color: var(--turq-dark);\n}\n\n.Documentation-exampleDetails {\n  margin-top: 1rem;\n}\n\n.Documentation-exampleDetailsBody pre {\n  border-radius: 0 0 0.3rem 0.3rem;\n  margin-bottom: 1rem;\n  margin-top: -0.25rem;\n}\n\n.Documentation-exampleDetailsBody textarea {\n  height: 100%;\n  outline: none;\n  overflow-x: auto;\n  resize: none;\n  white-space: pre;\n  width: 100%;\n}\n\n/**\n * We add another selector here to these two classes to increase CSS specificity,\n * the selector .Documentation pre + pre overrides .Documentation-exampleCode\n * and .Documentation-exampleOutput by itself and would replace the styles.\n */\n.Documentation-exampleDetailsBody .Documentation-exampleCode {\n  border-bottom-left-radius: 0;\n  border-bottom-right-radius: 0;\n  margin: 0;\n}\n\n.Documentation-exampleDetailsBody .Documentation-exampleOutput {\n  border-top-left-radius: 0;\n  border-top-right-radius: 0;\n  margin: 0 0 0.5rem;\n}\n\n.Documentation-exampleDetailsHeader {\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  margin-bottom: 2rem;\n  outline: none;\n  text-decoration: none;\n}\n\n.Documentation-exampleOutputLabel {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-exampleError {\n  color: var(--pink);\n  margin-right: 0.4rem;\n  padding-right: 0.5rem;\n}\n\n/* See https://golang.org/issue/43368 for context. */\n.Documentation-function pre,\n.Documentation-typeFunc pre,\n.Documentation-typeMethod pre {\n  white-space: pre-wrap;\n  word-break: break-all;\n  word-wrap: break-word;\n}\n\n.Documentation-indexDeprecated {\n  margin-left: 0.5rem;\n}\n\n.Documentation-deprecatedBody {\n  color: var(--color-text-subtle);\n  font-size: 0.87rem;\n  font-weight: 400;\n  margin-left: 0.25rem;\n  margin-right: 0.5rem;\n}\n\n.Documentation-deprecatedTag {\n  background-color: var(--color-border);\n  border-radius: 0.125rem;\n  color: var(--color-text-inverted);\n  font-size: 0.75rem;\n  font-weight: normal;\n  line-height: 1.375;\n  padding: 0.125rem 0.25rem;\n  text-transform: uppercase;\n  vertical-align: middle;\n}\n\n.Documentation-deprecatedTitle {\n  align-items: center;\n  display: flex;\n  gap: 0.5rem;\n}\n\n.Documentation-deprecatedDetails {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-deprecatedDetails a {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-deprecatedDetails[open] {\n  color: var(--color-text);\n}\n\n.Documentation-deprecatedDetails[open] a {\n  color: var(--color-brand-primary);\n}\n\n.Documentation-deprecatedDetails .Documentation-deprecatedBody::after {\n  color: var(--color-brand-primary);\n  content: 'Show';\n}\n\n.Documentation-deprecatedDetails[open] .Documentation-deprecatedBody::after {\n  color: var(--color-brand-primary);\n  content: 'Hide';\n}\n\n.Documentation-deprecatedDetails > summary {\n  list-style: none;\n  opacity: 1;\n}\n\n.Documentation-deprecatedDetails .Documentation-source {\n  opacity: 1;\n}\n\n.Documentation-deprecatedItemBody {\n  padding: 1rem 1rem 0.5rem;\n}\n\n.Documentation-deprecatedMessage {\n  align-items: center;\n  display: flex;\n  gap: 0.5rem;\n  margin-bottom: 1rem;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitFiles {\n  margin-bottom: 2rem;\n}\n\n.UnitFiles-titleLink {\n  position: relative;\n}\n\n.UnitFiles-titleLink a {\n  bottom: 1rem;\n  font-size: 0.875rem;\n  position: absolute;\n  right: 0;\n}\n\n.UnitFiles-titleLink a::after {\n  background-image: url('/static/shared/icon/launch_gm_grey_24dp.svg');\n  background-repeat: no-repeat;\n  background-size: 0.875rem 1.25rem;\n  content: '';\n  display: inline-block;\n  height: 1rem;\n  left: 0.3125rem;\n  position: relative;\n  top: 0.125rem;\n  width: 1rem;\n}\n\n.UnitFiles h2 a.UnitFiles-idLink,\n.UnitFiles summary a {\n  opacity: 0;\n}\n\n.UnitFiles h2:hover a,\n.UnitFiles summary:focus a {\n  opacity: 1;\n}\n\n.UnitFiles-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  margin: 0.5rem 0 0;\n  padding-bottom: 1rem;\n}\n\n.UnitFiles-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitFiles-fileList {\n  columns: 12.5rem 5;\n  line-height: 1.5rem;\n  list-style: none;\n  margin-top: 1rem;\n  padding-left: 0;\n  word-break: break-all;\n}\n", "/*!\n* Copyright 2019-2020 The Go Authors. All rights reserved.\n* Use of this source code is governed by a BSD-style\n* license that can be found in the LICENSE file.\n*/\n\n.UnitMeta {\n  display: grid;\n  gap: 1rem 2rem;\n  grid-template-columns: max-content auto;\n  white-space: nowrap;\n}\n\n.UnitMeta-details,\n.UnitMeta-links {\n  display: flex;\n  flex-flow: wrap;\n  flex-direction: row;\n  gap: 1rem 2rem;\n}\n\n.UnitMeta-repo {\n  align-items: center;\n  display: flex;\n  overflow: hidden;\n}\n\n.UnitMeta-repo a {\n  overflow: hidden;\n  text-overflow: ellipsis;\n}\n@media (min-width: 50rem) {\n  .UnitMeta {\n    grid-template-columns: max-content auto;\n  }\n\n  .UnitMeta-details,\n  .UnitMeta-links {\n    flex-direction: row;\n  }\n}\n@media (min-width: 112rem) {\n  :root[data-layout='responsive'] .UnitMeta {\n    grid-template-columns: 100%;\n  }\n\n  :root[data-layout='responsive'] .UnitMeta-details,\n  :root[data-layout='responsive'] .UnitMeta-links {\n    flex-direction: column;\n    white-space: nowrap;\n  }\n}\n\n.UnitMeta-detailsLearn {\n  width: 100%;\n}\n@media (min-width: 50rem) {\n  .UnitMeta-detailsLearn {\n    width: initial;\n  }\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitOutline-jumpTo {\n  display: flex;\n  margin-bottom: 1rem;\n}\n\n.UnitOutline-jumpTo button {\n  align-items: center;\n  background-color: var(--color-background);\n  border: var(--border);\n  border-radius: 0.25rem;\n  color: var(--color-text-subtle);\n  cursor: pointer;\n  height: 2rem;\n  padding-left: 1rem;\n  text-align: left;\n  width: 100%;\n}\n\n.UnitOutline-jumpTo button:hover:not([disabled]) {\n  border-color: var(--color-border);\n}\n\n.UnitOutline-jumpToInput:disabled {\n  background-color: var(--gray-9);\n}\n", "/*!\n* Copyright 2019-2020 The Go Authors. All rights reserved.\n* Use of this source code is governed by a BSD-style\n* license that can be found in the LICENSE file.\n*/\n\n/* ---------- */\n/*\n/* The CSS classes below are generated using devtools/cmd/css/main.go\n/* If the generated CSS already exists, the file is overwritten\n/*\n/* ---------- */\n\n.Overview-readmeContent details {\n  display: block;\n}\n.Overview-readmeContent summary {\n  display: list-item;\n}\n.Overview-readmeContent a {\n  background-color: initial;\n}\n.Overview-readmeContent a:active,\n.Overview-readmeContent a:hover {\n  outline-width: 0;\n}\n.Overview-readmeContent strong {\n  font-weight: inherit;\n  font-weight: bolder;\n}\n.Overview-readmeContent h3 {\n  font-size: 2em;\n  margin: 0.67em 0;\n}\n.Overview-readmeContent img {\n  border-style: none;\n}\n.Overview-readmeContent code,\n.Overview-readmeContent kbd,\n.Overview-readmeContent pre {\n  font-family: monospace, monospace;\n  font-size: 1em;\n}\n.Overview-readmeContent hr {\n  box-sizing: initial;\n  height: 0;\n  overflow: visible;\n}\n.Overview-readmeContent input {\n  font: inherit;\n  margin: 0;\n}\n.Overview-readmeContent input {\n  overflow: visible;\n}\n.Overview-readmeContent [type='checkbox'] {\n  box-sizing: border-box;\n  padding: 0;\n}\n.Overview-readmeContent * {\n  box-sizing: border-box;\n}\n.Overview-readmeContent input {\n  font-family: inherit;\n  font-size: inherit;\n  line-height: inherit;\n}\n.Overview-readmeContent a {\n  color: var(--color-brand-primary);\n  text-decoration: none;\n}\n.Overview-readmeContent a:hover {\n  text-decoration: underline;\n}\n.Overview-readmeContent strong {\n  font-weight: 600;\n}\n.Overview-readmeContent hr {\n  height: 0;\n  margin: 0.9375rem 0;\n  overflow: hidden;\n  background: transparent;\n  border: 0;\n  border-bottom: var(--border);\n}\n.Overview-readmeContent hr:after,\n.Overview-readmeContent hr:before {\n  display: table;\n  content: '';\n}\n.Overview-readmeContent hr:after {\n  clear: both;\n}\n.Overview-readmeContent table {\n  border-spacing: 0;\n  border-collapse: collapse;\n}\n.Overview-readmeContent td,\n.Overview-readmeContent th {\n  padding: 0;\n}\n.Overview-readmeContent details summary {\n  cursor: pointer;\n}\n.Overview-readmeContent kbd {\n  display: inline-block;\n  padding: 0.1875rem 0.3125rem;\n  font: 0.6875rem SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  line-height: 0.625rem;\n  color: #444d56;\n  vertical-align: middle;\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-radius: 0.1875rem;\n  box-shadow: inset 0 -0.0625rem 0 var(--border);\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4,\n.Overview-readmeContent h5,\n.Overview-readmeContent h6,\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent h3 {\n  font-size: 2rem;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4 {\n  font-weight: 600;\n}\n.Overview-readmeContent h4 {\n  font-size: 1.5rem;\n}\n.Overview-readmeContent h5 {\n  font-size: 1.25rem;\n}\n.Overview-readmeContent h5,\n.Overview-readmeContent h6 {\n  font-weight: 600;\n}\n.Overview-readmeContent h6 {\n  font-size: 1rem;\n}\n.Overview-readmeContent div[aria-level='7'] {\n  font-size: 0.875rem;\n}\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  font-weight: 600;\n}\n.Overview-readmeContent div[aria-level='8'] {\n  font-size: 0.75rem;\n}\n.Overview-readmeContent p {\n  margin-top: 0;\n  margin-bottom: 0.625rem;\n}\n.Overview-readmeContent blockquote {\n  margin: 0;\n}\n.Overview-readmeContent ol,\n.Overview-readmeContent ul {\n  padding-left: 0;\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent ol ol,\n.Overview-readmeContent ul ol {\n  list-style-type: lower-roman;\n}\n.Overview-readmeContent ol ol ol,\n.Overview-readmeContent ol ul ol,\n.Overview-readmeContent ul ol ol,\n.Overview-readmeContent ul ul ol {\n  list-style-type: lower-alpha;\n}\n.Overview-readmeContent dd {\n  margin-left: 0;\n}\n.Overview-readmeContent code,\n.Overview-readmeContent pre {\n  font-family: SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  font-size: 0.75rem;\n}\n.Overview-readmeContent pre {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent input::-webkit-inner-spin-button,\n.Overview-readmeContent input::-webkit-outer-spin-button {\n  margin: 0;\n  -webkit-appearance: none;\n  appearance: none;\n}\n.Overview-readmeContent :checked + .radio-label {\n  position: relative;\n  z-index: 1;\n  border-color: var(--color-brand-primary);\n}\n.Overview-readmeContent hr {\n  border-bottom-color: var(--color-border);\n}\n.Overview-readmeContent kbd {\n  display: inline-block;\n  padding: 0.1875rem 0.3125rem;\n  font: 0.6875rem SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  line-height: 0.625rem;\n  color: #444d56;\n  vertical-align: middle;\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-radius: 0.1875rem;\n  box-shadow: inset 0 -0.0625rem 0 var(--color-border);\n}\n.Overview-readmeContent a:not([href]) {\n  color: inherit;\n  text-decoration: none;\n}\n.Overview-readmeContent blockquote,\n.Overview-readmeContent details,\n.Overview-readmeContent dl,\n.Overview-readmeContent ol,\n.Overview-readmeContent p,\n.Overview-readmeContent pre,\n.Overview-readmeContent table,\n.Overview-readmeContent ul {\n  margin-top: 0;\n  margin-bottom: 1rem;\n}\n.Overview-readmeContent hr {\n  height: 0.25em;\n  padding: 0;\n  margin: 1.5rem 0;\n  background-color: var(--color-border);\n  border: 0;\n}\n.Overview-readmeContent blockquote {\n  padding: 0 1em;\n  color: var(--color-text-subtle);\n  border-left: 0.25em solid var(--color-border);\n}\n.Overview-readmeContent blockquote > :first-child {\n  margin-top: 0;\n}\n.Overview-readmeContent blockquote > :last-child {\n  margin-bottom: 0;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4,\n.Overview-readmeContent h5,\n.Overview-readmeContent h6,\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  margin-top: 1.5rem;\n  margin-bottom: 1rem;\n  font-weight: 600;\n  line-height: 1.25;\n}\n.Overview-readmeContent h3 {\n  font-size: 2em;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4 {\n  padding-bottom: 0.3em;\n  border-bottom: var(--border);\n}\n.Overview-readmeContent h4 {\n  font-size: 1.5em;\n}\n.Overview-readmeContent h5 {\n  font-size: 1.25em;\n}\n.Overview-readmeContent h6 {\n  font-size: 1em;\n}\n.Overview-readmeContent div[aria-level='7'] {\n  font-size: 0.875em;\n}\n.Overview-readmeContent div[aria-level='8'] {\n  font-size: 0.85em;\n  color: var(--color-text-subtle);\n}\n.Overview-readmeContent ol,\n.Overview-readmeContent ul {\n  padding-left: 2em;\n}\n.Overview-readmeContent ol ol,\n.Overview-readmeContent ol ul,\n.Overview-readmeContent ul ol,\n.Overview-readmeContent ul ul {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent li {\n  word-wrap: break-all;\n}\n.Overview-readmeContent li > p {\n  margin-top: 1rem;\n}\n.Overview-readmeContent li + li {\n  margin-top: 0.25em;\n}\n.Overview-readmeContent dl {\n  padding: 0;\n}\n.Overview-readmeContent dl dt {\n  padding: 0;\n  margin-top: 1rem;\n  font-size: 1em;\n  font-style: italic;\n  font-weight: 600;\n}\n.Overview-readmeContent dl dd {\n  padding: 0 1rem;\n  margin-bottom: 1rem;\n}\n.Overview-readmeContent table {\n  display: block;\n  width: 100%;\n  overflow: auto;\n}\n.Overview-readmeContent table th {\n  font-weight: 600;\n}\n.Overview-readmeContent table td,\n.Overview-readmeContent table th {\n  padding: 0.375rem 0.8125rem;\n  border: var(--border);\n}\n.Overview-readmeContent table tr {\n  background-color: var(--color-background);\n  border-top: var(--border);\n}\n.Overview-readmeContent table tr:nth-child(2n) {\n  background-color: var(--color-background-accented);\n}\n.Overview-readmeContent img {\n  max-width: 100%;\n  box-sizing: initial;\n  background-color: var(--color-background);\n}\n.Overview-readmeContent img[align='right'] {\n  padding-left: 1.25rem;\n}\n.Overview-readmeContent img[align='left'] {\n  padding-right: 1.25rem;\n}\n.Overview-readmeContent code {\n  padding: 0.2em 0.4em;\n  margin: 0;\n  font-size: 85%;\n  background-color: var(--color-background-accented);\n  border-radius: 0.1875rem;\n}\n.Overview-readmeContent pre {\n  word-wrap: normal;\n}\n.Overview-readmeContent pre > code {\n  padding: 0;\n  margin: 0;\n  font-size: 100%;\n  word-break: normal;\n  white-space: pre;\n  background: transparent;\n  border: 0;\n}\n.Overview-readmeContent pre {\n  padding: 1rem;\n  overflow: auto;\n  font-size: 85%;\n  line-height: 1.45;\n  background-color: var(--color-background-accented);\n  border-radius: 0.1875rem;\n}\n.Overview-readmeContent pre code {\n  display: inline;\n  max-width: auto;\n  padding: 0;\n  margin: 0;\n  overflow: visible;\n  line-height: inherit;\n  word-wrap: normal;\n  background-color: initial;\n  border: 0;\n}\n\n/* ---------- */\n/*\n/* End output from devtools/cmd/css/main.go\n/*\n/* ---------- */\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitReadme {\n  margin-bottom: 2rem;\n}\n\n.UnitReadme ul,\n.UnitReadme ol {\n  list-style: circle;\n}\n\n.UnitReadme h2 a.UnitReadme-idLink,\n.UnitReadme summary a {\n  opacity: 0;\n}\n\n.UnitReadme h2:hover a,\n.UnitReadme summary:focus a {\n  opacity: 1;\n}\n\n.UnitReadme-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  padding-bottom: 1rem;\n}\n\n.UnitReadme-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitReadme-content {\n  /* stylelint-disable-next-line property-no-vendor-prefix */\n  -webkit-mask-image: linear-gradient(to bottom, black 75%, transparent 100%);\n  mask-image: linear-gradient(to bottom, black 75%, transparent 100%);\n  max-height: 20rem;\n  overflow: hidden;\n  position: relative;\n}\n\n.UnitReadme-content ul {\n  line-height: 1.5rem;\n}\n\n.UnitReadme-expandLink {\n  background: none;\n  border: none;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  padding: 0;\n}\n\n.UnitReadme-collapseLink {\n  background: none;\n  border: none;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  display: none;\n  padding: 0;\n}\n\n.UnitReadme--expanded .UnitReadme-content {\n  /* stylelint-disable-next-line property-no-vendor-prefix */\n  -webkit-mask-image: none;\n  mask-image: none;\n  max-height: initial;\n  overflow: initial;\n}\n\n.UnitReadme--toggle .UnitReadme-expandLink {\n  display: block;\n}\n\n.UnitReadme--expanded .UnitReadme-expandLink {\n  display: none;\n}\n\n.UnitReadme--expanded.UnitReadme--toggle .UnitReadme-collapseLink {\n  display: block;\n}\n\n.Overview-readmeContent {\n  overflow-wrap: break-word;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n@import url('./_build-context.css');\n@import url('./_directories.css');\n@import url('./_doc.css');\n@import url('./_files.css');\n@import url('./_meta.css');\n@import url('./_outline.css');\n@import url('./_readme_gen.css');\n@import url('./_readme.css');\n\n.UnitDetails {\n  column-gap: 2rem;\n  display: grid;\n  grid-template-columns: minmax(0, auto);\n  margin: auto;\n  min-height: 32rem;\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails {\n    grid-template-columns: 15.5rem minmax(30.5rem, 43.125rem) minmax(10rem, 15.5rem);\n  }\n}\n@media only screen and (min-width: 80rem) {\n  .UnitDetails {\n    grid-template-columns: 15.5rem minmax(43.125rem, 60rem) 15.5rem;\n    justify-content: center;\n  }\n}\n\n.UnitDetails :target {\n  scroll-margin-top: calc(var(--js-sticky-header-height, 3.5rem) * 2.15);\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails :target {\n    scroll-margin-top: calc(var(--js-sticky-header-height, 3.5rem) * 1.25);\n  }\n}\n\n.UnitDetails :target:not(details, h2) {\n  background-color: var(--color-background-highlighted);\n  padding: 0.25rem;\n}\n\n.UnitDetails-meta {\n  order: -1;\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails-meta {\n    display: block;\n    margin-top: 2rem;\n    order: initial;\n  }\n}\n\n.UnitDetails-contentEmpty {\n  align-items: center;\n  background-color: var(--color-background-accented);\n  color: var(--color-text-subtle);\n  display: flex;\n  flex-direction: column;\n  height: 15rem;\n  padding-top: 1rem;\n  text-align: center;\n}\n\n.UnitDetails-contentEmpty img {\n  height: 7.8125rem;\n  width: auto;\n}\n"],
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+  "sourcesContent": ["/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitBuildContext-titleContext label,\n.UnitBuildContext-singleContext {\n  color: var(--color-text-subtle);\n  font-size: 0.875rem;\n}\n\n.UnitBuildContext-singleContext {\n  padding: 0.35rem 0;\n}\n\n.UnitBuildContext-titleContext select {\n  border-color: var(--color-border);\n  color: var(--color-text-subtle);\n  margin-left: 0.25rem;\n  min-width: 6rem;\n}\n\n.UnitBuildContext-titleContext option {\n  color: var(--color-text-subtle);\n}\n\n.UnitBuildContext-link {\n  display: none;\n}\n@media only screen and (min-width: 30rem) {\n  .UnitBuildContext-link {\n    display: initial;\n  }\n}\n\n.UnitDoc .UnitBuildContext-titleContext {\n  position: relative;\n}\n\n.UnitDoc .UnitBuildContext-titleContext label,\n.UnitDoc .UnitBuildContext-singleContext {\n  bottom: 0.875rem;\n  position: absolute;\n  right: 0;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitDirectories {\n  margin-bottom: 2rem;\n}\n\n.UnitDirectories h2 a.UnitDirectories-idLink,\n.UnitDirectories summary a {\n  opacity: 0;\n}\n\n.UnitDirectories h2:hover a,\n.UnitDirectories summary:focus a {\n  opacity: 1;\n}\n\n.UnitDirectories-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  margin: 0.5rem 0 0;\n  padding-bottom: 1rem;\n}\n\n.UnitDirectories-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitDirectories-table {\n  border-collapse: collapse;\n  height: 0;\n  table-layout: auto;\n  width: 100%;\n}\n\n.UnitDirectories-table--tree {\n  margin-top: -2rem;\n}\n\n.UnitDirectories-tableHeader {\n  background-color: var(--color-background-accented);\n}\n\n.UnitDirectories-tableHeader--tree {\n  visibility: hidden;\n}\n\n.UnitDirectories td {\n  border-bottom: var(--border);\n  max-width: 32rem;\n  min-width: 12rem;\n  padding: 0.25rem 1rem;\n  vertical-align: middle;\n  word-break: break-word;\n}\n\n.UnitDirectories th {\n  padding: 0.5rem 1rem;\n  text-align: left;\n}\n\n.UnitDirectories tr.hidden {\n  display: none;\n}\n\n.UnitDirectories tr[aria-controls] {\n  cursor: pointer;\n}\n\n.UnitDirectories tr[aria-controls]:hover {\n  background-color: var(--color-background-accented);\n}\n\n.UnitDirectories th.UnitDirectories-toggleHead {\n  font-size: 0;\n  max-width: 0.625rem;\n  padding: 0;\n  width: 0.625rem;\n}\n\n.UnitDirectories td.UnitDirectories-toggleCell,\nth.UnitDirectories-toggleCell {\n  background-color: var(--background);\n  border: var(--white);\n  max-width: 0.625rem;\n  padding: 0;\n  width: 0.625rem;\n}\n\n.UnitDirectories-toggleButton {\n  font-size: 1.25rem;\n  left: -0.75rem;\n  margin: 0 0 -1rem -0.875rem;\n  padding: 0;\n  position: absolute;\n  vertical-align: top;\n}\n\n.UnitDirectories-subSpacer {\n  border-right: var(--border);\n  display: inline;\n  margin-right: 0.875rem;\n  width: 0.0625rem;\n}\n\n.UnitDirectories-toggleButton[aria-expanded='true'] img {\n  transform: rotate(90deg);\n}\n\n.UnitDirectories-pathCell {\n  align-items: flex-start;\n  display: flex;\n  flex-direction: column;\n  line-height: 1.75rem;\n  word-break: break-all;\n}\n\n.UnitDirectories-pathCell > div {\n  position: relative;\n}\n\n.UnitDirectories-subdirectory {\n  border-left: var(--border);\n  display: flex;\n  flex-direction: column;\n  margin-left: 0.375rem;\n  padding: 0.5rem 1rem;\n}\n\n.UnitDirectories-internal {\n  display: none;\n}\n\n.UnitDirectories-showInternal .UnitDirectories-internal {\n  display: table-row;\n}\n\n.UnitDirectories-mobileSynopsis {\n  display: none;\n  line-height: 1.25rem;\n  margin-top: 0.25rem;\n  word-break: keep-all;\n}\n@media only screen and (max-width: 52rem) {\n  .UnitDirectories-mobileSynopsis {\n    display: initial;\n  }\n\n  .UnitDirectories-table th.UnitDirectories-desktopSynopsis,\n  .UnitDirectories-table td.UnitDirectories-desktopSynopsis {\n    display: none;\n  }\n}\n\n.UnitDirectories-toggles {\n  position: relative;\n}\n\n.UnitDirectories-toggleButtons {\n  bottom: 1rem;\n  display: flex;\n  gap: 1rem;\n  position: absolute;\n  right: 0;\n}\n\n.UnitDirectories-toggleButtons button {\n  background-color: transparent;\n  border: none;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  display: none;\n  font-size: 0.875rem;\n  text-decoration: none;\n}\n\n.UnitDirectories-badge {\n  border: 0.0625rem solid var(--color-text-subtle);\n  border-radius: 0.125rem;\n  font-size: 0.6875rem;\n  font-weight: 500;\n  line-height: 1rem;\n  margin-left: 0.5rem;\n  margin-top: 0.125rem;\n  padding: 0 0.35rem;\n  text-align: center;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/* stylelint-disable no-descending-specificity */\n.UnitDoc {\n  margin-bottom: 2rem;\n  word-break: break-word;\n}\n\n.UnitDoc h2 a.UnitDoc-idLink,\n.UnitDoc summary a {\n  opacity: 0;\n}\n\n.UnitDoc h2:hover a,\n.UnitDoc summary:focus a {\n  opacity: 1;\n}\n\n.UnitDoc-title {\n  border-bottom: var(--border);\n  padding-bottom: 1rem;\n}\n\n.UnitDoc-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitDoc-emptySection {\n  background-color: var(--color-background-accented);\n  color: var(--color-text-subtle);\n  height: 12.25rem;\n  margin-top: 1.5rem;\n  text-align: center;\n}\n\n.UnitDoc-emptySection img {\n  height: 7.8125rem;\n  width: auto;\n}\n\n.Documentation .UnitDoc-emptySection p {\n  margin: 1rem auto;\n}\n\n.UnitDoc .Documentation h4 {\n  margin-top: 1.5rem;\n}\n\n.Documentation {\n  display: block;\n}\n\n.Documentation p {\n  margin: 1rem 0;\n}\n\n.Documentation h2,\n.Documentation h3 {\n  margin-top: 1.5rem;\n}\n\n.Documentation a {\n  text-decoration: none;\n}\n\n.Documentation a:hover {\n  text-decoration: underline;\n}\n\n.Documentation h2 a,\n.Documentation h3 a,\n.Documentation h4 a.Documentation-idLink,\n.Documentation summary a {\n  opacity: 0;\n}\n\n.Documentation a:focus {\n  opacity: 1;\n}\n\n.Documentation h3 a.Documentation-source {\n  opacity: 1;\n}\n\n.Documentation h2:hover a,\n.Documentation h3:hover a,\n.Documentation h4:hover a,\n.Documentation summary:hover a,\n.Documentation summary:focus a {\n  opacity: 1;\n}\n\n.Documentation ul {\n  line-height: 1.5rem;\n  list-style: none;\n  padding-left: 0;\n}\n\n.Documentation ul ul {\n  padding-left: 2em;\n}\n\n.Documentation .Documentation-bulletList {\n  list-style: disc;\n  margin-bottom: 1rem;\n  padding-left: 2rem;\n}\n\n.Documentation .Documentation-numberList {\n  list-style: decimal;\n  margin-bottom: 1rem;\n  padding-left: 2rem;\n}\n\n.Documentation pre + pre {\n  margin-top: 0.625rem;\n}\n\n.Documentation .Documentation-declarationLink + pre {\n  border-radius: 0 0 0.3em 0.3em;\n  border-top: var(--border);\n  margin-top: 0;\n}\n\n.Documentation pre .comment {\n  color: var(--color-code-comment);\n}\n\n.Documentation-toc,\n.Documentation-overview,\n.Documentation-index,\n.Documentation-examples {\n  padding-bottom: 0;\n}\n\n.Documentation-empty {\n  color: var(--color-text-subtle);\n  margin-top: -0.5rem;\n}\n@media only screen and (min-width: 64rem) {\n  .Documentation-toc {\n    margin-left: 2rem;\n    white-space: nowrap;\n  }\n\n  .Documentation-toc-columns {\n    columns: 2;\n  }\n}\n\n.Documentation-toc:empty {\n  display: none;\n}\n\n.Documentation-tocItem {\n  overflow: hidden;\n  text-overflow: ellipsis;\n}\n\n.Documentation-tocItem--constants,\n.Documentation-tocItem--funcsAndTypes,\n.Documentation-tocItem--functions,\n.Documentation-tocItem--types,\n.Documentation-tocItem--variables,\n.Documentation-tocItem--notes {\n  display: none;\n}\n\n.Documentation-overviewHeader,\n.Documentation-indexHeader,\n.Documentation-constantsHeader,\n.Documentation-variablesHeader,\n.Documentation-examplesHeader,\n.Documentation-filesHeader,\n.Documentation-functionHeader,\n.Documentation-typeHeader,\n.Documentation-typeMethodHeader,\n.Documentation-typeFuncHeader {\n  margin-bottom: 0.5rem;\n}\n\n.Documentation-function h4,\n.Documentation-type h4,\n.Documentation-typeFunc h4,\n.Documentation-typeMethod h4 {\n  align-items: baseline;\n  display: flex;\n  justify-content: space-between;\n}\n\n.Documentation-sinceVersion {\n  color: var(--color-text-subtle);\n  font-size: 0.9375rem;\n  font-weight: 400;\n}\n\n.Documentation-constants br:last-of-type,\n.Documentation-variables br:last-of-type {\n  display: none;\n}\n\n.Documentation-build {\n  color: var(--color-text-subtle);\n  padding-top: 1.5rem;\n  text-align: right;\n}\n\n.Documentation-declaration pre {\n  scroll-padding-top: calc(var(--js-sticky-header-height, 3.5rem) + 3.75rem);\n}\n@media only screen and (min-width: 64rem) {\n  .Documentation-declaration pre {\n    scroll-padding-top: calc(var(--js-sticky-header-height, 3.5rem) + 0.75rem);\n  }\n}\n\n.Documentation-declaration + .Documentation-declaration {\n  margin-top: 0.625rem;\n}\n\n.Documentation-declarationLink {\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-bottom: none;\n  border-radius: 0.3em 0.3em 0 0;\n  display: block;\n  font-size: 0.75rem;\n  line-height: 0.5rem;\n  padding: 0.375rem;\n  text-align: right;\n}\n\n.Documentation-exampleButtonsContainer {\n  align-items: center;\n  display: flex;\n  justify-content: flex-end;\n  margin-top: 0.5rem;\n}\n\n.Documentation-examplePlayButton {\n  background-color: var(--white);\n  border: 0.15rem solid var(--turq-med);\n  color: var(--turq-med);\n  cursor: pointer;\n  flex-shrink: 0;\n  height: 2.5rem;\n  width: 4.125rem;\n}\n\n.Documentation-exampleRunButton,\n.Documentation-exampleShareButton,\n.Documentation-exampleFormatButton {\n  border: 0.0625rem solid var(--turq-dark);\n  border-radius: 0.25rem;\n  cursor: pointer;\n  height: 2rem;\n  margin-left: 0.5rem;\n  padding: 0 1rem;\n}\n\n.Documentation-exampleRunButton {\n  background-color: var(--turq-dark);\n  color: var(--white);\n}\n\n.Documentation-exampleShareButton,\n.Documentation-exampleFormatButton {\n  background-color: var(--white);\n  color: var(--turq-dark);\n}\n\n.Documentation-exampleDetails {\n  margin-top: 1rem;\n}\n\n.Documentation-exampleDetailsBody pre {\n  border-radius: 0 0 0.3rem 0.3rem;\n  margin-bottom: 1rem;\n  margin-top: -0.25rem;\n}\n\n.Documentation-exampleDetailsBody textarea {\n  height: 100%;\n  outline: none;\n  overflow-x: auto;\n  resize: none;\n  white-space: pre;\n  width: 100%;\n}\n\n/**\n * We add another selector here to these two classes to increase CSS specificity,\n * the selector .Documentation pre + pre overrides .Documentation-exampleCode\n * and .Documentation-exampleOutput by itself and would replace the styles.\n */\n.Documentation-exampleDetailsBody .Documentation-exampleCode {\n  border-bottom-left-radius: 0;\n  border-bottom-right-radius: 0;\n  margin: 0;\n}\n\n.Documentation-exampleDetailsBody .Documentation-exampleOutput {\n  border-top-left-radius: 0;\n  border-top-right-radius: 0;\n  margin: 0 0 0.5rem;\n}\n\n.Documentation-exampleDetailsHeader {\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  margin-bottom: 2rem;\n  outline: none;\n  text-decoration: none;\n}\n\n.Documentation-exampleOutputLabel {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-exampleError {\n  color: var(--pink);\n  margin-right: 0.4rem;\n  padding-right: 0.5rem;\n}\n\n/* See https://golang.org/issue/43368 for context. */\n.Documentation-function pre,\n.Documentation-typeFunc pre,\n.Documentation-typeMethod pre {\n  white-space: pre-wrap;\n  word-break: break-all;\n  word-wrap: break-word;\n}\n\n.Documentation-indexDeprecated {\n  margin-left: 0.5rem;\n}\n\n.Documentation-deprecatedBody {\n  color: var(--color-text-subtle);\n  font-size: 0.87rem;\n  font-weight: 400;\n  margin-left: 0.25rem;\n  margin-right: 0.5rem;\n}\n\n.Documentation-deprecatedTag {\n  background-color: var(--color-border);\n  border-radius: 0.125rem;\n  color: var(--color-text-inverted);\n  font-size: 0.75rem;\n  font-weight: normal;\n  line-height: 1.375;\n  padding: 0.125rem 0.25rem;\n  text-transform: uppercase;\n  vertical-align: middle;\n}\n\n.Documentation-deprecatedTitle {\n  align-items: center;\n  display: flex;\n  gap: 0.5rem;\n}\n\n.Documentation-deprecatedDetails {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-deprecatedDetails a {\n  color: var(--color-text-subtle);\n}\n\n.Documentation-deprecatedDetails[open] {\n  color: var(--color-text);\n}\n\n.Documentation-deprecatedDetails[open] a {\n  color: var(--color-brand-primary);\n}\n\n.Documentation-deprecatedDetails .Documentation-deprecatedBody::after {\n  color: var(--color-brand-primary);\n  content: 'Show';\n}\n\n.Documentation-deprecatedDetails[open] .Documentation-deprecatedBody::after {\n  color: var(--color-brand-primary);\n  content: 'Hide';\n}\n\n.Documentation-deprecatedDetails > summary {\n  list-style: none;\n  opacity: 1;\n}\n\n.Documentation-deprecatedDetails .Documentation-source {\n  opacity: 1;\n}\n\n.Documentation-deprecatedItemBody {\n  padding: 1rem 1rem 0.5rem;\n}\n\n.Documentation-deprecatedMessage {\n  align-items: center;\n  display: flex;\n  gap: 0.5rem;\n  margin-bottom: 1rem;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitFiles {\n  margin-bottom: 2rem;\n}\n\n.UnitFiles-titleLink {\n  position: relative;\n}\n\n.UnitFiles-titleLink a {\n  bottom: 1rem;\n  font-size: 0.875rem;\n  position: absolute;\n  right: 0;\n}\n\n.UnitFiles-titleLink a::after {\n  background-image: url('/static/shared/icon/launch_gm_grey_24dp.svg');\n  background-repeat: no-repeat;\n  background-size: 0.875rem 1.25rem;\n  content: '';\n  display: inline-block;\n  height: 1rem;\n  left: 0.3125rem;\n  position: relative;\n  top: 0.125rem;\n  width: 1rem;\n}\n\n.UnitFiles h2 a.UnitFiles-idLink,\n.UnitFiles summary a {\n  opacity: 0;\n}\n\n.UnitFiles h2:hover a,\n.UnitFiles summary:focus a {\n  opacity: 1;\n}\n\n.UnitFiles-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  margin: 0.5rem 0 0;\n  padding-bottom: 1rem;\n}\n\n.UnitFiles-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitFiles-fileList {\n  columns: 12.5rem 5;\n  line-height: 1.5rem;\n  list-style: none;\n  margin-top: 1rem;\n  padding-left: 0;\n  word-break: break-all;\n}\n", "/*!\n* Copyright 2019-2020 The Go Authors. All rights reserved.\n* Use of this source code is governed by a BSD-style\n* license that can be found in the LICENSE file.\n*/\n\n.UnitMeta {\n  display: grid;\n  gap: 1rem 2rem;\n  grid-template-columns: max-content auto;\n  white-space: nowrap;\n}\n\n.UnitMeta-details,\n.UnitMeta-links {\n  display: flex;\n  flex-flow: wrap;\n  flex-direction: row;\n  gap: 1rem 2rem;\n}\n\n.UnitMeta-repo {\n  align-items: center;\n  display: flex;\n  overflow: hidden;\n}\n\n.UnitMeta-repo a {\n  overflow: hidden;\n  text-overflow: ellipsis;\n}\n@media (min-width: 50rem) {\n  .UnitMeta {\n    grid-template-columns: max-content auto;\n  }\n\n  .UnitMeta-details,\n  .UnitMeta-links {\n    flex-direction: row;\n  }\n}\n@media (min-width: 112rem) {\n  :root[data-layout='responsive'] .UnitMeta {\n    grid-template-columns: 100%;\n  }\n\n  :root[data-layout='responsive'] .UnitMeta-details,\n  :root[data-layout='responsive'] .UnitMeta-links {\n    flex-direction: column;\n    white-space: nowrap;\n  }\n}\n\n.UnitMeta-detailsLearn {\n  width: 100%;\n}\n@media (min-width: 50rem) {\n  .UnitMeta-detailsLearn {\n    width: initial;\n  }\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitOutline-jumpTo {\n  display: flex;\n  margin-bottom: 1rem;\n}\n\n.UnitOutline-jumpTo button {\n  align-items: center;\n  background-color: var(--color-background);\n  border: var(--border);\n  border-radius: 0.25rem;\n  color: var(--color-text-subtle);\n  cursor: pointer;\n  height: 2rem;\n  padding-left: 1rem;\n  text-align: left;\n  width: 100%;\n}\n\n.UnitOutline-jumpTo button:hover:not([disabled]) {\n  border-color: var(--color-border);\n}\n\n.UnitOutline-jumpToInput:disabled {\n  background-color: var(--gray-9);\n}\n", "/*!\n* Copyright 2019-2020 The Go Authors. All rights reserved.\n* Use of this source code is governed by a BSD-style\n* license that can be found in the LICENSE file.\n*/\n\n/* ---------- */\n/*\n/* The CSS classes below are generated using devtools/cmd/css/main.go\n/* If the generated CSS already exists, the file is overwritten\n/*\n/* ---------- */\n\n.Overview-readmeContent details {\n  display: block;\n}\n.Overview-readmeContent summary {\n  display: list-item;\n}\n.Overview-readmeContent a {\n  background-color: initial;\n}\n.Overview-readmeContent a:active,\n.Overview-readmeContent a:hover {\n  outline-width: 0;\n}\n.Overview-readmeContent strong {\n  font-weight: inherit;\n  font-weight: bolder;\n}\n.Overview-readmeContent h3 {\n  font-size: 2em;\n  margin: 0.67em 0;\n}\n.Overview-readmeContent img {\n  border-style: none;\n}\n.Overview-readmeContent code,\n.Overview-readmeContent kbd,\n.Overview-readmeContent pre {\n  font-family: monospace, monospace;\n  font-size: 1em;\n}\n.Overview-readmeContent hr {\n  box-sizing: initial;\n  height: 0;\n  overflow: visible;\n}\n.Overview-readmeContent input {\n  font: inherit;\n  margin: 0;\n}\n.Overview-readmeContent input {\n  overflow: visible;\n}\n.Overview-readmeContent [type='checkbox'] {\n  box-sizing: border-box;\n  padding: 0;\n}\n.Overview-readmeContent * {\n  box-sizing: border-box;\n}\n.Overview-readmeContent input {\n  font-family: inherit;\n  font-size: inherit;\n  line-height: inherit;\n}\n.Overview-readmeContent a {\n  color: var(--color-brand-primary);\n  text-decoration: none;\n}\n.Overview-readmeContent a:hover {\n  text-decoration: underline;\n}\n.Overview-readmeContent strong {\n  font-weight: 600;\n}\n.Overview-readmeContent hr {\n  height: 0;\n  margin: 0.9375rem 0;\n  overflow: hidden;\n  background: transparent;\n  border: 0;\n  border-bottom: var(--border);\n}\n.Overview-readmeContent hr:after,\n.Overview-readmeContent hr:before {\n  display: table;\n  content: '';\n}\n.Overview-readmeContent hr:after {\n  clear: both;\n}\n.Overview-readmeContent table {\n  border-spacing: 0;\n  border-collapse: collapse;\n}\n.Overview-readmeContent td,\n.Overview-readmeContent th {\n  padding: 0;\n}\n.Overview-readmeContent details summary {\n  cursor: pointer;\n}\n.Overview-readmeContent kbd {\n  display: inline-block;\n  padding: 0.1875rem 0.3125rem;\n  font: 0.6875rem SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  line-height: 0.625rem;\n  color: #444d56;\n  vertical-align: middle;\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-radius: 0.1875rem;\n  box-shadow: inset 0 -0.0625rem 0 var(--border);\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4,\n.Overview-readmeContent h5,\n.Overview-readmeContent h6,\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent h3 {\n  font-size: 2rem;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4 {\n  font-weight: 600;\n}\n.Overview-readmeContent h4 {\n  font-size: 1.5rem;\n}\n.Overview-readmeContent h5 {\n  font-size: 1.25rem;\n}\n.Overview-readmeContent h5,\n.Overview-readmeContent h6 {\n  font-weight: 600;\n}\n.Overview-readmeContent h6 {\n  font-size: 1rem;\n}\n.Overview-readmeContent div[aria-level='7'] {\n  font-size: 0.875rem;\n}\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  font-weight: 600;\n}\n.Overview-readmeContent div[aria-level='8'] {\n  font-size: 0.75rem;\n}\n.Overview-readmeContent p {\n  margin-top: 0;\n  margin-bottom: 0.625rem;\n}\n.Overview-readmeContent blockquote {\n  margin: 0;\n}\n.Overview-readmeContent ol,\n.Overview-readmeContent ul {\n  padding-left: 0;\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent ol ol,\n.Overview-readmeContent ul ol {\n  list-style-type: lower-roman;\n}\n.Overview-readmeContent ol ol ol,\n.Overview-readmeContent ol ul ol,\n.Overview-readmeContent ul ol ol,\n.Overview-readmeContent ul ul ol {\n  list-style-type: lower-alpha;\n}\n.Overview-readmeContent dd {\n  margin-left: 0;\n}\n.Overview-readmeContent code,\n.Overview-readmeContent pre {\n  font-family: SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  font-size: 0.75rem;\n}\n.Overview-readmeContent pre {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent input::-webkit-inner-spin-button,\n.Overview-readmeContent input::-webkit-outer-spin-button {\n  margin: 0;\n  -webkit-appearance: none;\n  appearance: none;\n}\n.Overview-readmeContent :checked + .radio-label {\n  position: relative;\n  z-index: 1;\n  border-color: var(--color-brand-primary);\n}\n.Overview-readmeContent hr {\n  border-bottom-color: var(--color-border);\n}\n.Overview-readmeContent kbd {\n  display: inline-block;\n  padding: 0.1875rem 0.3125rem;\n  font: 0.6875rem SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;\n  line-height: 0.625rem;\n  color: #444d56;\n  vertical-align: middle;\n  background-color: var(--color-background-accented);\n  border: var(--border);\n  border-radius: 0.1875rem;\n  box-shadow: inset 0 -0.0625rem 0 var(--color-border);\n}\n.Overview-readmeContent a:not([href]) {\n  color: inherit;\n  text-decoration: none;\n}\n.Overview-readmeContent blockquote,\n.Overview-readmeContent details,\n.Overview-readmeContent dl,\n.Overview-readmeContent ol,\n.Overview-readmeContent p,\n.Overview-readmeContent pre,\n.Overview-readmeContent table,\n.Overview-readmeContent ul {\n  margin-top: 0;\n  margin-bottom: 1rem;\n}\n.Overview-readmeContent hr {\n  height: 0.25em;\n  padding: 0;\n  margin: 1.5rem 0;\n  background-color: var(--color-border);\n  border: 0;\n}\n.Overview-readmeContent blockquote {\n  padding: 0 1em;\n  color: var(--color-text-subtle);\n  border-left: 0.25em solid var(--color-border);\n}\n.Overview-readmeContent blockquote > :first-child {\n  margin-top: 0;\n}\n.Overview-readmeContent blockquote > :last-child {\n  margin-bottom: 0;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4,\n.Overview-readmeContent h5,\n.Overview-readmeContent h6,\n.Overview-readmeContent div[aria-level='7'],\n.Overview-readmeContent div[aria-level='8'] {\n  margin-top: 1.5rem;\n  margin-bottom: 1rem;\n  font-weight: 600;\n  line-height: 1.25;\n}\n.Overview-readmeContent h3 {\n  font-size: 2em;\n}\n.Overview-readmeContent h3,\n.Overview-readmeContent h4 {\n  padding-bottom: 0.3em;\n  border-bottom: var(--border);\n}\n.Overview-readmeContent h4 {\n  font-size: 1.5em;\n}\n.Overview-readmeContent h5 {\n  font-size: 1.25em;\n}\n.Overview-readmeContent h6 {\n  font-size: 1em;\n}\n.Overview-readmeContent div[aria-level='7'] {\n  font-size: 0.875em;\n}\n.Overview-readmeContent div[aria-level='8'] {\n  font-size: 0.85em;\n  color: var(--color-text-subtle);\n}\n.Overview-readmeContent ol,\n.Overview-readmeContent ul {\n  padding-left: 2em;\n}\n.Overview-readmeContent ol ol,\n.Overview-readmeContent ol ul,\n.Overview-readmeContent ul ol,\n.Overview-readmeContent ul ul {\n  margin-top: 0;\n  margin-bottom: 0;\n}\n.Overview-readmeContent li {\n  word-wrap: break-all;\n}\n.Overview-readmeContent li > p {\n  margin-top: 1rem;\n}\n.Overview-readmeContent li + li {\n  margin-top: 0.25em;\n}\n.Overview-readmeContent dl {\n  padding: 0;\n}\n.Overview-readmeContent dl dt {\n  padding: 0;\n  margin-top: 1rem;\n  font-size: 1em;\n  font-style: italic;\n  font-weight: 600;\n}\n.Overview-readmeContent dl dd {\n  padding: 0 1rem;\n  margin-bottom: 1rem;\n}\n.Overview-readmeContent table {\n  display: block;\n  width: 100%;\n  overflow: auto;\n}\n.Overview-readmeContent table th {\n  font-weight: 600;\n}\n.Overview-readmeContent table td,\n.Overview-readmeContent table th {\n  padding: 0.375rem 0.8125rem;\n  border: var(--border);\n}\n.Overview-readmeContent table tr {\n  background-color: var(--color-background);\n  border-top: var(--border);\n}\n.Overview-readmeContent table tr:nth-child(2n) {\n  background-color: var(--color-background-accented);\n}\n.Overview-readmeContent img {\n  max-width: 100%;\n  box-sizing: initial;\n  background-color: var(--color-background);\n}\n.Overview-readmeContent img[align='right'] {\n  padding-left: 1.25rem;\n}\n.Overview-readmeContent img[align='left'] {\n  padding-right: 1.25rem;\n}\n.Overview-readmeContent code {\n  padding: 0.2em 0.4em;\n  margin: 0;\n  font-size: 85%;\n  background-color: var(--color-background-accented);\n  border-radius: 0.1875rem;\n}\n.Overview-readmeContent pre {\n  word-wrap: normal;\n}\n.Overview-readmeContent pre > code {\n  padding: 0;\n  margin: 0;\n  font-size: 100%;\n  word-break: normal;\n  white-space: pre;\n  background: transparent;\n  border: 0;\n}\n.Overview-readmeContent pre {\n  padding: 1rem;\n  overflow: auto;\n  font-size: 85%;\n  line-height: 1.45;\n  background-color: var(--color-background-accented);\n  border-radius: 0.1875rem;\n}\n.Overview-readmeContent pre code {\n  display: inline;\n  max-width: auto;\n  padding: 0;\n  margin: 0;\n  overflow: visible;\n  line-height: inherit;\n  word-wrap: normal;\n  background-color: initial;\n  border: 0;\n}\n\n/* ---------- */\n/*\n/* End output from devtools/cmd/css/main.go\n/*\n/* ---------- */\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n.UnitReadme {\n  margin-bottom: 2rem;\n}\n\n.UnitReadme ul,\n.UnitReadme ol {\n  list-style: circle;\n}\n\n.UnitReadme h2 a.UnitReadme-idLink,\n.UnitReadme summary a {\n  opacity: 0;\n}\n\n.UnitReadme h2:hover a,\n.UnitReadme summary:focus a {\n  opacity: 1;\n}\n\n.UnitReadme-title {\n  border-bottom: var(--border);\n  font-size: 1.375rem;\n  padding-bottom: 1rem;\n}\n\n.UnitReadme-title img {\n  margin: auto 1rem auto 0;\n}\n\n.UnitReadme-content {\n  /* stylelint-disable-next-line property-no-vendor-prefix */\n  -webkit-mask-image: linear-gradient(to bottom, black 75%, transparent 100%);\n  mask-image: linear-gradient(to bottom, black 75%, transparent 100%);\n  max-height: 20rem;\n  overflow: hidden;\n  position: relative;\n}\n\n.UnitReadme-content ul {\n  line-height: 1.5rem;\n}\n\n.UnitReadme-expandLink {\n  background: none;\n  border: none;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  padding: 0;\n}\n\n.UnitReadme-collapseLink {\n  background: none;\n  border: none;\n  color: var(--color-brand-primary);\n  cursor: pointer;\n  display: none;\n  padding: 0;\n}\n\n.UnitReadme--expanded .UnitReadme-content {\n  /* stylelint-disable-next-line property-no-vendor-prefix */\n  -webkit-mask-image: none;\n  mask-image: none;\n  max-height: initial;\n  overflow: initial;\n}\n\n.UnitReadme--toggle .UnitReadme-expandLink {\n  display: block;\n}\n\n.UnitReadme--expanded .UnitReadme-expandLink {\n  display: none;\n}\n\n.UnitReadme--expanded.UnitReadme--toggle .UnitReadme-collapseLink {\n  display: block;\n}\n\n.Overview-readmeContent {\n  overflow-wrap: break-word;\n}\n", "/*!\n * Copyright 2020 The Go Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n@import url('./_build-context.css');\n@import url('./_directories.css');\n@import url('./_doc.css');\n@import url('./_files.css');\n@import url('./_meta.css');\n@import url('./_outline.css');\n@import url('./_readme_gen.css');\n@import url('./_readme.css');\n\n.UnitDetails {\n  column-gap: 2rem;\n  display: grid;\n  grid-template-columns: minmax(0, auto);\n  margin: auto;\n  min-height: 32rem;\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails {\n    grid-template-columns: 15.5rem minmax(30.5rem, 43.125rem) minmax(10rem, 15.5rem);\n  }\n}\n@media only screen and (min-width: 80rem) {\n  .UnitDetails {\n    grid-template-columns: 15.5rem minmax(43.125rem, 60rem) 15.5rem;\n    justify-content: center;\n  }\n}\n\n.UnitDetails :target {\n  scroll-margin-top: calc(var(--js-sticky-header-height, 3.5rem) * 2.15);\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails :target {\n    scroll-margin-top: calc(var(--js-sticky-header-height, 3.5rem) * 1.25);\n  }\n}\n\n.UnitDetails :target:not(details, h2) {\n  background-color: var(--color-background-highlighted);\n  padding: 0.25rem;\n}\n\n.UnitDetails-meta {\n  order: -1;\n}\n@media only screen and (min-width: 64rem) {\n  .UnitDetails-meta {\n    display: block;\n    margin-top: 2rem;\n    order: initial;\n  }\n}\n\n.UnitDetails-contentEmpty {\n  align-items: center;\n  background-color: var(--color-background-accented);\n  color: var(--color-text-subtle);\n  display: flex;\n  flex-direction: column;\n  height: 15rem;\n  padding-top: 1rem;\n  text-align: center;\n}\n\n.UnitDetails-contentEmpty img {\n  height: 7.8125rem;\n  width: auto;\n}\n"],
+  "mappings": ";;;;;AAMA,qEAEE,+BACA,kBAGF,gCAZA,iBAgBA,sCACE,iCACA,+BACA,mBACA,eAGF,sCACE,+BAGF,uBACE,aAEF,0CACE,uBACE,iBAIJ,wCACE,kBAGF,uFAEE,eACA,kBACA,QCtCF,iBACE,mBAGF,wEAEE,UAGF,6DAEE,UAGF,uBACE,4BACA,mBAtBF,iBAwBE,oBAGF,2BA3BA,wBA+BA,uBACE,yBACA,SACA,kBACA,WAGF,6BACE,iBAGF,6BACE,kDAGF,mCACE,kBAGF,oBACE,4BACA,gBACA,gBArDF,oBAuDE,sBACA,sBAGF,oBA3DA,mBA6DE,gBAGF,2BACE,aAGF,mCACE,eAGF,yCACE,kDAGF,+CACE,YACA,kBA9EF,UAgFE,cAGF,6EAEE,mCACA,oBACA,kBAvFF,UAyFE,cAGF,8BACE,kBACA,aA9FF,oCAiGE,kBACA,mBAGF,2BACE,2BACA,eACA,qBACA,eAGF,sDACE,wBAGF,0BACE,uBACA,aACA,sBACA,oBACA,qBAGF,8BACE,kBAGF,8BACE,0BACA,aACA,sBACA,oBAhIF,mBAoIA,0BACE,aAGF,wDACE,kBAGF,gCACE,aACA,oBACA,kBACA,oBAEF,0CACE,gCACE,gBAGF,oHAEE,cAIJ,yBACE,kBAGF,+BACE,YACA,aACA,SACA,kBACA,QAGF,sCACE,6BACA,YACA,iCACA,eACA,aACA,kBACA,qBAGF,uBACE,+CApLF,sBAsLE,mBACA,gBACA,iBACA,kBACA,mBA1LF,iBA4LE,kBCrLF,SACE,mBACA,sBAGF,gDAEE,UAGF,6CAEE,UAGF,eACE,4BACA,oBAGF,mBA3BA,wBA+BA,sBACE,kDACA,+BACA,gBACA,kBACA,kBAGF,0BACE,iBACA,WAGF,uCA5CA,iBAgDA,2BACE,kBAGF,eACE,cAGF,iBAxDA,cA4DA,oCAEE,kBAGF,iBACE,qBAGF,uBACE,0BAGF,0GAIE,UAGF,uBACE,UAGF,yCACE,UAGF,4IAKE,UAGF,kBACE,mBACA,gBACA,eAGF,qBACE,iBAGF,yCACE,gBACA,mBACA,kBAGF,yCACE,mBACA,mBACA,kBAGF,uBACE,mBAGF,kDA1HA,4BA4HE,yBACA,aAGF,4BACE,gCAGF,wFAIE,iBAGF,qBACE,+BACA,kBAEF,0CACE,mBACE,iBACA,mBAGF,2BACE,WAIJ,yBACE,aAGF,uBACE,gBACA,uBAGF,wMAME,aAGF,sSAUE,oBAGF,0GAIE,qBACA,aACA,8BAGF,4BACE,+BACA,mBACA,gBAGF,kFAEE,aAGF,qBACE,+BACA,mBACA,iBAGF,+BACE,0EAEF,0CACE,+BACE,0EAIJ,sDACE,mBAGF,+BACE,kDACA,qBACA,mBAnOF,4BAqOE,cACA,iBACA,kBAvOF,gBAyOE,iBAGF,uCACE,mBACA,aACA,yBACA,iBAGF,iCACE,8BACA,oCACA,sBACA,eACA,cACA,cACA,eAGF,qGAGE,uCAhQF,qBAkQE,eACA,YACA,kBApQF,eAwQA,gCACE,kCACA,mBAGF,qEAEE,8BACA,uBAGF,8BACE,gBAGF,sCAvRA,8BAyRE,mBACA,mBAGF,2CACE,YACA,aACA,gBACA,YACA,gBACA,WAQF,6DACE,4BACA,6BA7SF,SAiTA,+DACE,yBACA,0BAnTF,iBAuTA,oCACE,iCACA,eACA,mBACA,aACA,qBAGF,kCACE,+BAGF,4BACE,kBACA,mBACA,oBAIF,sFAGE,qBACA,qBACA,qBAGF,+BACE,kBAGF,8BACE,+BACA,iBACA,gBACA,mBACA,mBAGF,6BACE,qCA/VF,sBAiWE,iCACA,iBACA,gBACA,kBApWF,uBAsWE,yBACA,sBAGF,+BACE,mBACA,aACA,UAGF,oEACE,+BAOF,uCACE,wBAGF,yCACE,iCAGF,qEACE,iCACA,eAGF,2EACE,iCACA,eAGF,yCACE,gBACA,UAGF,uDACE,UAGF,kCAnZA,wBAuZA,iCACE,mBACA,aACA,UACA,mBCrZF,WACE,mBAGF,qBACE,kBAGF,uBACE,YACA,kBACA,kBACA,QAGF,6BACE,kEACA,4BACA,gCACA,WACA,qBACA,YACA,cACA,kBACA,YACA,WAGF,sDAEE,UAGF,iDAEE,UAGF,iBACE,4BACA,mBA9CF,iBAgDE,oBAGF,qBAnDA,wBAuDA,oBACE,kBACA,mBACA,gBACA,gBACA,eACA,qBCvDF,UACE,aACA,cACA,uCACA,mBAGF,kCAEE,aACA,eACA,mBACA,cAGF,eACE,mBACA,aACA,gBAGF,iBACE,gBACA,uBAEF,0BACE,UACE,uCAGF,kCAEE,oBAGJ,2BACE,wCACE,2BAGF,8FAEE,sBACA,oBAIJ,uBACE,WAEF,0BACE,uBACE,eCpDJ,oBACE,aACA,mBAGF,2BACE,mBACA,yCACA,qBAdF,qBAgBE,+BACA,eACA,YACA,kBACA,gBACA,WAGF,iDACE,iCAGF,kCACE,+BChBF,gCACE,cAEF,gCACE,kBAEF,0BACE,yBAEF,iEAEE,gBAEF,+BACE,oBACA,mBAEF,2BACE,cA/BF,eAkCA,4BACE,kBAEF,qFAGE,gCACA,cAEF,2BACE,mBACA,SACA,iBAEF,8BACE,aAjDF,SAoDA,8BACE,iBAEF,wCACE,sBAxDF,UA2DA,0BACE,sBAEF,8BACE,oBACA,kBACA,oBAEF,0BACE,iCACA,qBAEF,gCACE,0BAEF,+BACE,gBAEF,2BACE,SA9EF,kBAgFE,gBACA,uBACA,SACA,4BAEF,mEAEE,cACA,WAEF,iCACE,WAEF,8BACE,iBACA,yBAEF,sDAjGA,UAqGA,wCACE,eAEF,4BACE,qBAzGF,0BA2GE,sEACA,oBACA,cACA,sBACA,kDACA,qBAhHF,uBAkHE,6CAEF,oMAME,aACA,gBAEF,2BACE,eAEF,sDAEE,gBAEF,2BACE,iBAEF,2BACE,kBAEF,sDAEE,gBAEF,2BACE,eAEF,4CACE,kBAEF,wFAEE,gBAEF,4CACE,iBAEF,0BACE,aACA,sBAEF,mCA/JA,SAkKA,sDAEE,eACA,aACA,gBAEF,4DAEE,4BAEF,oIAIE,4BAEF,2BACE,cAEF,yDAEE,oEACA,iBAEF,4BACE,aACA,gBAEF,kHA9LA,SAiME,wBACA,gBAEF,8CACE,kBACA,UACA,wCAEF,2BACE,wCAEF,4BACE,qBA7MF,0BA+ME,sEACA,oBACA,cACA,sBACA,kDACA,qBApNF,uBAsNE,mDAEF,sCACE,cACA,qBAEF,wOAQE,aACA,mBAEF,2BACE,aAxOF,0BA2OE,qCACA,SAEF,mCA9OA,cAgPE,+BACA,4CAEF,gDACE,aAEF,+CACE,gBAEF,oMAME,kBACA,mBACA,gBACA,iBAEF,2BACE,cAEF,sDAEE,oBACA,4BAEF,2BACE,gBAEF,2BACE,iBAEF,2BACE,cAEF,4CACE,iBAEF,4CACE,gBACA,+BAEF,sDAEE,iBAEF,wHAIE,aACA,gBAEF,2BACE,oBAEF,6BACE,gBAEF,8BACE,iBAEF,2BAhTA,UAmTA,8BAnTA,UAqTE,gBACA,cACA,kBACA,gBAEF,8BA1TA,eA4TE,mBAEF,8BACE,cACA,WACA,cAEF,iCACE,gBAEF,kEAtUA,yBAyUE,qBAEF,iCACE,yCACA,yBAEF,+CACE,kDAEF,4BACE,eACA,mBACA,yCAEF,yCACE,qBAEF,wCACE,sBAEF,6BA7VA,2BAgWE,cACA,kDAjWF,uBAoWA,4BACE,iBAEF,iCAvWA,mBA0WE,eACA,kBACA,gBACA,uBACA,SAEF,4BAhXA,aAkXE,cACA,cACA,iBACA,kDArXF,uBAwXA,iCACE,eACA,eA1XF,mBA6XE,iBACA,oBACA,iBACA,yBACA,SC3XF,YACE,mBAGF,8BAEE,kBAGF,yDAEE,UAGF,mDAEE,UAGF,kBACE,4BACA,mBACA,oBAGF,sBA/BA,wBAmCA,oBAEE,yEACA,iEACA,iBACA,gBACA,kBAGF,uBACE,mBAGF,uBACE,gBACA,YACA,iCACA,eApDF,UAwDA,yBACE,gBACA,YACA,iCACA,eACA,aA7DF,UAiEA,0CAEE,wBACA,gBACA,mBACA,iBAGF,2CACE,cAGF,6CACE,aAGF,kEACE,cAGF,wBACE,yBCvEF,aACE,gBACA,aACA,qCAlBF,YAoBE,iBAEF,0CACE,aACE,+EAGJ,0CACE,aACE,8DACA,wBAIJ,qBACE,sEAEF,0CACE,qBACE,uEAIJ,qCACE,qDA5CF,eAgDA,kBACE,SAEF,0CACE,kBACE,cACA,gBACA,eAIJ,0BACE,mBACA,kDACA,+BACA,aACA,sBACA,aACA,iBACA,kBAGF,8BACE,iBACA",
   "names": []
 }
diff --git a/static/frontend/unit/main/main.ts b/static/frontend/unit/main/main.ts
index 8c11915..c750033 100644
--- a/static/frontend/unit/main/main.ts
+++ b/static/frontend/unit/main/main.ts
@@ -15,6 +15,25 @@
   if (window.location.search.includes('expand-directories')) {
     table.expandAllItems();
   }
+
+  const internalToggle = document.querySelector<HTMLButtonElement>('.js-showInternalDirectories');
+  if (internalToggle) {
+    if (document.querySelector('.UnitDirectories-internal')) {
+      internalToggle.style.display = 'block';
+    }
+    internalToggle.addEventListener('click', () => {
+      if (directories.classList.contains('UnitDirectories-showInternal')) {
+        directories.classList.remove('UnitDirectories-showInternal');
+        internalToggle.innerText = 'Show internal';
+      } else {
+        directories.classList.add('UnitDirectories-showInternal');
+        internalToggle.innerText = 'Hide internal';
+      }
+    });
+  }
+  if (document.querySelector('html[data-local="true"]')) {
+    internalToggle?.click();
+  }
 }
 
 const treeEl = document.querySelector<HTMLElement>('.js-tree');
diff --git a/tests/screentest/testdata/standard-library-540x1080.a.png b/tests/screentest/testdata/standard-library-540x1080.a.png
index 3e44c64..8e3b692 100644
--- a/tests/screentest/testdata/standard-library-540x1080.a.png
+++ b/tests/screentest/testdata/standard-library-540x1080.a.png
Binary files differ
diff --git a/tests/screentest/testdata/standard-library.a.png b/tests/screentest/testdata/standard-library.a.png
index 6de188c..4525d3c 100644
--- a/tests/screentest/testdata/standard-library.a.png
+++ b/tests/screentest/testdata/standard-library.a.png
Binary files differ
diff --git a/tests/screentest/testdata/x-tools-540x1080.a.png b/tests/screentest/testdata/x-tools-540x1080.a.png
index 44ace7d..c4e532a 100644
--- a/tests/screentest/testdata/x-tools-540x1080.a.png
+++ b/tests/screentest/testdata/x-tools-540x1080.a.png
Binary files differ
diff --git a/tests/screentest/testdata/x-tools.a.png b/tests/screentest/testdata/x-tools.a.png
index 4f80168..4928c03 100644
--- a/tests/screentest/testdata/x-tools.a.png
+++ b/tests/screentest/testdata/x-tools.a.png
Binary files differ