def mark(self, element):
        """
        marks the requested resource in the cache as not fresh
        :param element:
        :return:
        """
        logger.debug("Element : {elm}".format(elm=str(element)))
        if element is not None:
            logger.debug("Mark as not fresh")
            element.freshness = False
        logger.debug(str(self.cache))
marks the requested resource in the cache as not fresh
        :param element:
        :return: