You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: builder.go
    path of file: ./repos/cockroach/pkg/cmd/dev
    
    the code of the file until where you have to start completion: // Copyright 2020 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source Licens
    
func makeBuilderCmd(runE func(cmd *cobra.Command, args []string) error) *cobra.Command {
	builderCmd := &cobra.Command{
		Use:     "builder",
		Short:   "Run the Bazel builder image",
		Long:    "Run the Bazel builder image.",
		Example: `dev builder`,
		Args:    cobra.MinimumNArgs(0),
		RunE:    runE,
	}
	builderCmd.Flags().String(volumeFlag, "bzlhome", "the Docker volume to use as the container home directory")
	return builderCmd
}