Returns cache entry parameter value by its name.

        :param str entry_name:
        :param str key:
        :param type default:
        :return:

def _cache_get_entry(self, entry_name, key=ENTIRE_ENTRY_KEY, default=False):
        """Returns cache entry parameter value by its name.

        :param str entry_name:
        :param str key:
        :param type default:
        :return:
        """
        if key is self.ENTIRE_ENTRY_KEY:
            return self._cache[entry_name]
        return self._cache[entry_name].get(key, default)