code: def transfer_project(self, to_project_id, **kwargs):
          
          path = '/groups/%s/projects/%s' % (self.id, to_project_id)
          self.manager.gitlab.http_post(path, **kwargs)
docs: Transfer a project to this group.
  
          Args:
              to_project_id (int): ID of the project to transfer
              **kwargs: Extra options to send to the server (e.g. sudo)
  
          Raises:
              GitlabAuthenticationError: If authentication is not correct
              GitlabTransferProjectError: If the project could not be transfered