socketio/virtsocket.py
def _pop_ack_callback(self, msgid):
        """Fetch the callback for a given msgid, if it exists, otherwise,
        return None"""
        if msgid not in self.ack_callbacks:
            return None
        return self.ack_callbacks.pop(msgid)
def _pop_ack_callback(self, msgid):
        """Fetch the callback for a given msgid, if it exists, otherwise,
        return None"""
        if msgid not in self.ack_callbacks:
            return None
        return self.ack_callbacks.pop(msgid)
Fetch the callback for a given msgid, if it exists, otherwise,
        return None