interface AssetCollectionInterface

AssetCollectionIterator.php in drupal/core/vendor/kriswallsmith/assetic/src/Assetic/Asset/Iterator/AssetCollectionIterator.php

AssetFactory.php in drupal/core/vendor/kriswallsmith/assetic/src/Assetic/Factory/AssetFactory.php

interface AssetCollectionInterface extends AssetInterface, \Traversable {

  /**
   * Returns all child assets.
   *
   * @return array An array of AssetInterface objects
   */
  public function all();

  /**
   * Adds an asset to the current collection.
   *
   * @param AssetInterface $asset An asset
   */
  public function add(AssetInterface $asset);

  /**
   * Removes a leaf.
   *
   * @param AssetInterface $needle The leaf to remove
   *
   * @throws \InvalidArgumentException If the asset cannot be found
   */
  public function removeLeaf(AssetInterface $leaf);

  /**
   * Replaces an existing leaf with a new one.
   *
   * @param AssetInterface $needle      The current asset to replace
   * @param AssetInterface $replacement The new asset
   *
   * @throws InvalidArgumentException If the asset cannot be found
   */
  public function replaceLeaf(AssetInterface $needle, AssetInterface $replacement);

}