interface ConfigFactoryOverrideInterface

interface ConfigFactoryOverrideInterface {
    
    /**
     * Returns config overrides.
     *
     * @param array $names
     *   A list of configuration names that are being loaded.
     *
     * @return array
     *   An array keyed by configuration name of override data. Override data
     *   contains a nested array structure of overrides.
     */
    public function loadOverrides($names);
    
    /**
     * The string to append to the configuration static cache name.
     *
     * @return string
     *   A string to append to the configuration static cache name.
     */
    public function getCacheSuffix();
    
    /**
     * Creates a configuration object for use during install and synchronization.
     *
     * If the overrider stores its overrides in configuration collections then
     * it can have its own implementation of
     * \Drupal\Core\Config\StorableConfigBase. Configuration overriders can link
     * themselves to a configuration collection by listening to the
     * \Drupal\Core\Config\ConfigCollectionEvents::COLLECTION_INFO event and
     * adding the collections they are responsible for. Doing this will allow
     * installation and synchronization to use the overrider's implementation of
     * StorableConfigBase. Additionally, the overrider's implementation should
     * trigger the appropriate event:
     * - Saving and creating triggers ConfigCollectionEvents::SAVE_IN_COLLECTION.
     * - Deleting triggers ConfigCollectionEvents::DELETE_IN_COLLECTION.
     * - Renaming triggers ConfigCollectionEvents::RENAME_IN_COLLECTION.
     *
     * @see \Drupal\Core\Config\ConfigCollectionInfo
     * @see \Drupal\Core\Config\ConfigImporter::importConfig()
     * @see \Drupal\Core\Config\ConfigInstaller::createConfiguration()
     * @see \Drupal\Core\Config\ConfigCollectionEvents::SAVE_IN_COLLECTION
     * @see \Drupal\Core\Config\ConfigCollectionEvents::DELETE_IN_COLLECTION
     * @see \Drupal\Core\Config\ConfigCollectionEvents::RENAME_IN_COLLECTION
     *
     * @param string $name
     *   The configuration object name.
     * @param string $collection
     *   The configuration collection.
     *
     * @return \Drupal\Core\Config\StorableConfigBase|null
     *   The configuration object for the provided name and collection. NULL
     *   should be returned when the overrider does not use configuration
     *   collections. For example: a module that provides an overrider to avoid
     *   storing API keys in config would not use collections.
     */
    public function createConfigObject($name, $collection = StorageInterface::DEFAULT_COLLECTION);
    
    /**
     * Gets the cacheability metadata associated with the config factory override.
     *
     * @param string $name
     *   The name of the configuration override to get metadata for.
     *
     * @return \Drupal\Core\Cache\CacheableMetadata
     *   A cacheable metadata object.
     */
    public function getCacheableMetadata($name);

}