plugin-8.x-2.8/tests/modules/plugin_test_helper/src/Plugin/PluginTestHelper/MockPluginInterface.php

<?php

namespace Drupal\plugin_test_helper\Plugin\PluginTestHelper;

use Drupal\Component\Plugin\PluginInspectionInterface;

/**
 * Defines a mock plugin.
 */
interface MockPluginInterface extends PluginInspectionInterface {
}