def set_processing_message(self, message, warning=True):
        """
        Sets the processing operation message.

        :param message: Operation description.
        :type message: unicode
        :param warning: Emit warning message.
        :type warning: int
        :return: Method success.
        :rtype: bool
        """

        if not self.__is_processing:
            warning and LOGGER.warning(
                "!> {0} | Engine not processing, 'set_processing_message' request has been ignored!".format(
                    self.__class__.__name__))
            return False

        LOGGER.debug("> Setting processing message!")

        self.Application_Progress_Status_processing.Processing_label.setText(message)
        self.process_events()
        return True
Sets the processing operation message.

        :param message: Operation description.
        :type message: unicode
        :param warning: Emit warning message.
        :type warning: int
        :return: Method success.
        :rtype: bool