MatthiasMullie\Scrapbook\KeyValueStore::deleteMulti PHP Method

    public function deleteMulti(array $keys);

 /**
  * {@inheritdoc}
  */
 public function deleteItems(array $keys)
 {
     foreach ($keys as $key) {
         $this->assertValidKey($key);
         unset($this->deferred[$key]);
     }
     $success = $this->store->deleteMulti($keys);
     return !in_array(false, $success);
 }