Elementor\TemplateLibrary\Manager::register_default_sources PHP Метод

    private function register_default_sources()
    {
        include ELEMENTOR_PATH . 'includes/template-library/classes/class-import-images.php';
        include ELEMENTOR_PATH . 'includes/template-library/sources/base.php';
        $sources = ['local', 'remote'];
        foreach ($sources as $source_filename) {
            include ELEMENTOR_PATH . 'includes/template-library/sources/' . $source_filename . '.php';
            $class_name = ucwords($source_filename);
            $class_name = str_replace('-', '_', $class_name);
            $this->register_source(__NAMESPACE__ . '\\Source_' . $class_name);
        }
    }