def _connect_broker(self):
        """
        Establish a reference to the Broker, Router and parent context used for
        connections.
        """
        if not self.broker:
            self.broker = mitogen.master.Broker()
            self.router, self.parent = mitogen.unix.connect(
                path=ansible_mitogen.process.MuxProcess.unix_listener_path,
                broker=self.broker,
            )
Establish a reference to the Broker, Router and parent context used for
        connections.