code: func (s *GroupsService) GetGroupName(groupID string) (string, *Response, error) {
  	u := fmt.Sprintf("groups/%s/name", groupID)
  	return getStringResponseWithoutOptions(s.client, u)
  }
docs: // GetGroupName retrieves the name of a group.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-groups.html#get-group-name