| test validity of a rename operation at location | |
| Usage: | |
| gopls [flags] prepare_rename <position> | |
| Example: | |
| $ # 1-indexed location (:line:column or :#offset) of the target identifier | |
| $ gopls prepare_rename helper/helper.go:8:6 | |
| $ gopls prepare_rename helper/helper.go:#53 |