func checkPrefix(prefix string) error {
	if strings.HasPrefix(prefix, "/") || build.IsLocalImport(prefix) {
		return fmt.Errorf("invalid prefix: %q", prefix)
	}
	return nil
}
func checkPrefix(prefix string) error {
	if strings.HasPrefix(prefix, "/") || build.IsLocalImport(prefix) {
		return fmt.Errorf("invalid prefix: %q", prefix)
	}
	return nil
}
func checkPrefix ( prefix string ) error { if strings . HasPrefix ( prefix , " " ) || build . IsLocalImport ( prefix ) { return fmt . Errorf ( " " , prefix ) } return nil }
// checkPrefix checks that a string may be used as a prefix. We forbid local
// (relative) imports and those beginning with "/". We allow the empty string,
// but generated rules must not have an empty importpath.
checkPrefix checks that a string may be used as a prefix . We forbid local ( relative ) imports and those beginning with / . We allow the empty string but generated rules must not have an empty importpath .