code: def wrap_subscribe_broadcast(transport_layer, channel, callback, *args, **kwargs):
      
  
      return _wrap_subscription(
          transport_layer,
          transport_layer.subscribe_broadcast,
          channel,
          callback,
          *args,
          **kwargs
      )
docs: Listen to a topic on the transport layer, similar to the
      subscribe_broadcast call in transport/common_transport.py. Intercept all
      incoming messages and parse for recipe information.
      See common_transport.subscribe_broadcast for possible arguments.
        :param transport_layer: Reference to underlying transport object.
        :param channel:  Topic name to subscribe to.
        :param callback: Function to be called when messages are received.
                         The callback will pass three arguments,
                         a RecipeWrapper object (details below), the header as
                         a dictionary structure, and the message.
        :return: A unique subscription ID