code: def get_build_controller(self, controller_id):
          
          route_values = {}
          if controller_id is not None:
              route_values['controllerId'] = self._serialize.url('controller_id', controller_id, 'int')
          response = self._send(http_method='GET',
                                location_id='fcac1932-2ee1-437f-9b6f-7f696be858f6',
                                version='5.0',
                                route_values=route_values)
          return self._deserialize('BuildController', response)
docs: GetBuildController.
          Gets a controller
          :param int controller_id:
          :rtype: :class:`<BuildController> <azure.devops.v5_0.build.models.BuildController>`