TraversableTypedDataInterface.php

<?php

namespace Drupal\Core\TypedData;


/**
 * An interface for typed data objects that can be traversed.
 */
interface TraversableTypedDataInterface extends TypedDataInterface, \Traversable {
    
    /**
     * React to changes to a child property or item.
     *
     * Note that this is invoked after any changes have been applied.
     *
     * @param $name
     *   The name of the property or the delta of the list item which is changed.
     */
    public function onChange($name);

}