public FileStorage::getAllCollectionNames()
Gets the existing collections.
A configuration storage can contain multiple sets of configuration objects in partitioned collections. The collection key name identifies the current collection used.
array An array of existing collection names.
Overrides StorageInterface::getAllCollectionNames
public function getAllCollectionNames() { $collections = $this->getAllCollectionNamesHelper($this->directory); sort($collections); return $collections; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Config!FileStorage.php/function/FileStorage::getAllCollectionNames/8.1.x