code: def get_handler_classes(self):
          
  
          handler_classes = [import_string(handler_cls) for handler_cls in settings.MODERNRPC_HANDLERS]
  
          if self.protocol == ALL:
              return handler_classes
          else:
              return [cls for cls in handler_classes if cls.protocol in ensure_sequence(self.protocol)]
docs: Return the list of handlers to use when receiving RPC requests.