public function delete_many(array $keys) {
        if ($this->persist) {
            foreach ($keys as $key) {
                unset($this->store[$key]);
            }
        }
        return count($keys);
    }
public function delete_many(array $keys) {
        if ($this->persist) {
            foreach ($keys as $key) {
                unset($this->store[$key]);
            }
        }
        return count($keys);
    }
public function delete_many ( array $ keys ) { if ( $ this -> persist ) { foreach ( $ keys as $ key ) { unset ( $ this -> store [ $ key ] ) ; } } return count ( $ keys ) ; }
Deletes many items from the cache
@param array $keys
@return bool
Deletes many items from the cache