def register_receive_callback(self, callback):
        if callback not in self._recv_callbacks:
            self._recv_callbacks.append(callback)
Notify the master that this slave exists.
dataset/ETHPy150Open mne-tools/mne-python/mne/realtime/fieldtrip_client.py/FieldTripClient.register_receive_callback--crossover with--dataset/ETHPy150Open box/ClusterRunner/app/slave/cluster_slave.py/ClusterSlave.connect_to_master