<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def msgHasAcceptableInstId(self, msg, frm) -> bool: """ Return true if the instance id of message corresponds to a correct replica. :param msg: the node message to validate :return: """

        # TODO: refactor this! this should not do anything except checking!
        instId = getattr(msg, f.INST_ID.nm, None)
        if not (isinstance(instId, int) and instId >= 0):
            return False
        if instId >= self.requiredNumberOfInstances:
            if instId not in self.msgsForFutureReplicas:
                self.msgsForFutureReplicas[instId] = deque()
            self.msgsForFutureReplicas[instId].append((msg, frm))
            logger.debug("{} queueing message {} for future protocol instance {}".format(self, msg, instId))
            return False
        return True