def METHOD_NAME(self, byte_order, packed_data):
    """ Send message. """
    message = struct.pack(byte_order + "BBI",
                          WEBSOCKET_BINARY_FRAME | WEBSOCKET_FIN_BIT,
                          WEBSOCKET_FIN_BIT + struct.unpack(byte_order + "B", bytes([packed_data[0]]))[0],
                          0) + packed_data[1:]
    self.__send_data(message)