code: public BoxRequestsFile.GetCollaborations getCollaborationsRequest(String id) {
          BoxRequestsFile.GetCollaborations request = new BoxRequestsFile.GetCollaborations(id, getFileCollaborationsUrl(id), mSession);
          return request;
      }
docs: Gets a request that gets the collaborations of a file
  
  @param id        id of file to request collaborations of
  @return      request to get collaborations