code: func (s *DomainsService) ListCollaborators(accountID, domainIdentifier string, options *ListOptions) (*collaboratorsResponse, error) {
  	path := versioned(collaboratorPath(accountID, domainIdentifier, 0))
  	collaboratorsResponse := &collaboratorsResponse{}
  
  	path, err := addURLQueryOptions(path, options)
  	if err != nil {
  		return nil, err
  	}
  
  	resp, err := s.client.get(path, collaboratorsResponse)
  	if err != nil {
  		return collaboratorsResponse, err
  	}
  
  	collaboratorsResponse.HttpResponse = resp
  	return collaboratorsResponse, nil
  }
docs: // ListCollaborators list the collaborators for a domain.
  //
  // See https://developer.dnsimple.com/v2/domains/collaborators#list