for theme elementor widgets loader

elementor-extensions.php

//elementor includes
include get_template_directory() . '/includes/elements/elementor-extensions.php';

<?php

namespace WPC;

class Widget_Loader
{

	private static $_instance = null;

	public static function instance()
	{
		if (is_null(self::$_instance)) {
			self::$_instance = new self();
		}
		return self::$_instance;
	}


	private function include_widgets_files()
	{
		require_once(__DIR__ . '/multi-image/multi-image.php');
        require_once(__DIR__ . '/team-member/team-member.php');
        require_once(__DIR__ . '/testimonial/testimonial.php');
        require_once(__DIR__ . '/faqs/faq.php');
       

	}

	public function register_widgets()
	{

		$this->include_widgets_files();

		\Elementor\Plugin::instance()->widgets_manager->register_widget_type(new Widgets\Multi_Image_Widget());
        \Elementor\Plugin::instance()->widgets_manager->register_widget_type(new Widgets\Team_Image_Widget());
        \Elementor\Plugin::instance()->widgets_manager->register_widget_type(new Widgets\Testimonial_Widget());
        \Elementor\Plugin::instance()->widgets_manager->register_widget_type(new Widgets\Faq_Widget());
	}

	public function __construct()
	{
		add_action('elementor/widgets/widgets_registered', [$this, 'register_widgets'], 99);
		add_action('elementor/elements/categories_registered', [$this, 'elementor_common_category']);
		// Register Widget Styles


	}



	// Custom JS


	// Custom Category
	

	public function elementor_common_category()
	{

		\Elementor\Plugin::$instance->elements_manager->add_category(
			'elemeta-category',
			[
				'title' => __('Elemeta Category', 'elemeta-elements'),
				'icon' => 'fa fa-plug', //default icon
			]
		);
	}
}

// Instantiate Plugin Class
Widget_Loader::instance();