code: def get_result(self, *, backend=None, block=False, timeout=None):
          
          if not backend:
              broker = get_broker()
              for middleware in broker.middleware:
                  if isinstance(middleware, Results):
                      backend = middleware.backend
                      break
              else:
                  raise RuntimeError("The default broker doesn't have a results backend.")
  
          return backend.get_result(self, block=block, timeout=timeout)
docs: Get the result associated with this message from a result
          backend.
  
          Warning:
            If you use multiple result backends or brokers you should
            always pass the backend parameter.  This method is only able
            to infer the result backend off of the default broker.
  
          Parameters:
            backend(ResultBackend): The result backend to use to get the
              result.  If omitted, this method will try to find and use
              the result backend on the default broker instance.
            block(bool): Whether or not to block while waiting for a
              result.
            timeout(int): The maximum amount of time, in ms, to block
              while waiting for a result.
  
          Raises:
            RuntimeError: If there is no result backend on the default
              broker.
            ResultMissing: When block is False and the result isn't set.
            ResultTimeout: When waiting for a result times out.
  
          Returns:
            object: The result.