protected function addPotentialAction()
    {
        $class = static::$helper->get_search_action_type();
        if (class_exists( $class )) {
            $class_test = new \ReflectionClass( $class );
            if ($class_test->implementsInterface( 'Lti\Seo\Generators\ICanSearch' )) {
                $this->potentialAction = new $class( static::$helper );
            }
        }
    }