def __init__(self, master_callback):
        """

        Args:
            master_callback: a callback to be invoked after having collected messages from slave devices.
        """
        self._master_callback = master_callback
        self._queue = queue.Queue()
        self._registry = collections.OrderedDict()
        self._activated = False


        Args:
            master_callback: a callback to be invoked after having collected messages from slave devices.
        
third-party/lama/bin/models/ade20k/segm_lib/nn/modules/comm.py