ExampleWithOtherModuleDependency.php

<?php

declare (strict_types=1);
namespace Drupal\plugin_test\Plugin\plugin_test\custom_annotation;

use Drupal\plugin_test\Plugin\Attribute\PluginExample;
use Drupal\plugin_test_extended\Plugin\TestExternalDependencyInterface;

/**
 * Test class with a dependency on another module.
 */
class ExampleWithOtherModuleDependency implements TestExternalDependencyInterface {

}