ConfigurablePluginBase.php

<?php

declare (strict_types=1);
namespace Drupal\Core\Plugin;

use Drupal\Component\Plugin\ConfigurableInterface;

/**
 * Base class for plugins that are configurable.
 *
 * Provides boilerplate methods for implementing
 * Drupal\Component\Plugin\ConfigurableInterface. Configurable plugins may
 * extend this base class instead of PluginBase. If your plugin must extend a
 * different base class, you may use \Drupal\Component\Plugin\ConfigurableTrait
 * directly and call setConfiguration() in your constructor.
 *
 * @see \Drupal\Core\Plugin\ConfigurableTrait
 */
abstract class ConfigurablePluginBase extends PluginBase implements ConfigurableInterface {
    use ConfigurableTrait;
    
    /**
     * {@inheritdoc}
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->setConfiguration($configuration);
    }

}