fix methodFamily breakage
diff --git a/call.go b/call.go
index 8b68809..b5f9292 100644
--- a/call.go
+++ b/call.go
@@ -117,7 +117,7 @@
 		}
 	}()
 	if EnableTracing {
-		c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
+		c.traceInfo.tr = trace.New("grpc.Sent."+transport.MethodFamily(method), method)
 		defer c.traceInfo.tr.Finish()
 		c.traceInfo.firstLine.client = true
 		if deadline, ok := ctx.Deadline(); ok {
diff --git a/stream.go b/stream.go
index 6dc4744..28938a3 100644
--- a/stream.go
+++ b/stream.go
@@ -126,7 +126,7 @@
 		tracing: EnableTracing,
 	}
 	if cs.tracing {
-		cs.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
+		cs.traceInfo.tr = trace.New("grpc.Sent."+transport.MethodFamily(method), method)
 		cs.traceInfo.firstLine.client = true
 		if deadline, ok := ctx.Deadline(); ok {
 			cs.traceInfo.firstLine.deadline = deadline.Sub(time.Now())
diff --git a/trace.go b/trace.go
index cde04fb..9b88444 100644
--- a/trace.go
+++ b/trace.go
@@ -38,7 +38,6 @@
 	"fmt"
 	"io"
 	"net"
-	"strings"
 	"time"
 
 	"golang.org/x/net/trace"
@@ -48,19 +47,6 @@
 // This should only be set before any RPCs are sent or received by this program.
 var EnableTracing = true
 
-// methodFamily returns the trace family for the given method.
-// It turns "/pkg.Service/GetFoo" into "pkg.Service".
-func methodFamily(m string) string {
-	m = strings.TrimPrefix(m, "/") // remove leading slash
-	if i := strings.Index(m, "/"); i >= 0 {
-		m = m[:i] // remove everything from second slash
-	}
-	if i := strings.LastIndex(m, "."); i >= 0 {
-		m = m[i+1:] // cut down to last dotted component
-	}
-	return m
-}
-
 // traceInfo contains tracing information for an RPC.
 type traceInfo struct {
 	tr        trace.Trace
diff --git a/transport/http2_server.go b/transport/http2_server.go
index b7cc536..0fcf6c4 100644
--- a/transport/http2_server.go
+++ b/transport/http2_server.go
@@ -44,8 +44,8 @@
 
 	"golang.org/x/net/context"
 	"golang.org/x/net/http2"
-	"golang.org/x/net/trace"
 	"golang.org/x/net/http2/hpack"
+	"golang.org/x/net/trace"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
diff --git a/transport/transport.go b/transport/transport.go
index 7ea2a11..93efeae 100644
--- a/transport/transport.go
+++ b/transport/transport.go
@@ -43,6 +43,7 @@
 	"fmt"
 	"io"
 	"net"
+	"strings"
 	"sync"
 	"time"
 
@@ -53,6 +54,19 @@
 	"google.golang.org/grpc/metadata"
 )
 
+// MethodFamily returns the trace family for the given method.
+// It turns "/pkg.Service/GetFoo" into "pkg.Service".
+func MethodFamily(m string) string {
+	m = strings.TrimPrefix(m, "/") // remove leading slash
+	if i := strings.Index(m, "/"); i >= 0 {
+		m = m[:i] // remove everything from second slash
+	}
+	if i := strings.LastIndex(m, "."); i >= 0 {
+		m = m[i+1:] // cut down to last dotted component
+	}
+	return m
+}
+
 // recvMsg represents the received msg from the transport. All transport
 // protocol specific info has been removed.
 type recvMsg struct {