Defines a custom exception for an invalid libraries-extend specification. Hierarchy class

Groups CSS assets. Hierarchy class \Drupal\Core\Asset\

public CssCollectionOptimizer::__construct(AssetColl

Discovers information for asset (CSS/JavaScript) libraries. Library information is statically cached. Libraries are keyed by extension for several

public AssetCollectionOptimizerInt

protected CssOptimizer::loadNestedFile($matches)

protected JsCollectionOptimizer::generateHash(array $j

protected LibraryDiscoveryCollector::applyLibr

public LibraryDiscoveryInterface::getLibraryByName($extension

public LibraryDiscovery::__construct(CacheCollectorInterface $li