code: func (s *ChangesService) GetRelatedChanges(changeID, revisionID string) (*RelatedChangesInfo, *Response, error) {
  	u := fmt.Sprintf("changes/%s/revisions/%s/related", changeID, revisionID)
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	v := new(RelatedChangesInfo)
  	resp, err := s.client.Do(req, v)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return v, resp, err
  }
docs: // GetRelatedChanges retrieves related changes of a revision.
  // Related changes are changes that either depend on, or are dependencies of the revision.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#get-related-changes