FallbackPluginManagerInterface.php

<?php

namespace Drupal\Component\Plugin;


/**
 * An interface implemented by plugin managers with fallback plugin behaviors.
 */
interface FallbackPluginManagerInterface {
    
    /**
     * Gets a fallback id for a missing plugin.
     *
     * @param string $plugin_id
     *   The ID of the missing requested plugin.
     * @param array $configuration
     *   An array of configuration relevant to the plugin instance.
     *
     * @return string
     *   The id of an existing plugin to use when the plugin does not exist.
     */
    public function getFallbackPluginId($plugin_id, array $configuration = []);

}