/**
* Return the filling percentage of the backend storage
*
* @return int integer between 0 and 100
*/
public function getFillingPercentage() { if (!
$this->_extendedBackend
) { Zend_Cache::
throwException(self::BACKEND_NOT_IMPLEMENTS_EXTENDED_IF
);
} return $this->_backend->
getFillingPercentage();
} /**
* Return an array of metadatas for the given cache id
*
* The array will include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
*
* @return array array of metadatas (false if the cache id is not found)
*/