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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def forward(self, request: Request):
 """ Forward the specified client REQUEST to the other replicas on this node :param request: the REQUEST to propagate """

        key = request.key
        num_replicas = self.replicas.num_replicas
        logger.debug('{} forwarding request {} to {} replicas'
                     .format(self, key, num_replicas))
        self.replicas.pass_message(ReqKey(key))
        self.monitor.requestUnOrdered(key)
        self.requests.mark_as_forwarded(request, num_replicas)