code: def tryForwarding(self, request: Request):
          
          cannot_reason_msg = self.canForward(request)
          if cannot_reason_msg is None:
              # If haven't got the client request(REQUEST) for the corresponding
              # propagate request(PROPAGATE) but have enough propagate requests
              # to move ahead
              self.forward(request)
          else:
              logger.trace("{} not forwarding request {} to its replicas "
                           "since {}".format(self, request, cannot_reason_msg))
docs: Try to forward the request if the required conditions are met.
          See the method `canForward` for the conditions to check before
          forwarding a request.