code: def activate_nsxcontroller(self, **kwargs):
          
          name = kwargs.pop('name')
          name_args = dict(name=name)
          method_name = 'nsx_controller_activate'
          method_class = self._brocade_tunnels
          nsxcontroller_attr = getattr(method_class, method_name)
          config = nsxcontroller_attr(**name_args)
          output = self._callback(config)
          return output
docs: Activate NSX Controller
  
          Args:
              name (str): nsxcontroller name
              callback (function): A function executed upon completion of the
                   method.
  
          Returns:
             Return value of `callback`.
  
          Raises:
              None