code: func (s *GroupsService) GetGroupMember(groupID, accountID string) (*AccountInfo, *Response, error) {
  	u := fmt.Sprintf("groups/%s/members/%s", groupID, accountID)
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	v := new(AccountInfo)
  	resp, err := s.client.Do(req, v)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return v, resp, err
  }
docs: // GetGroupMember retrieves a group member.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-groups.html#get-group-member