public function __construct( $id_base = '', $name = '', $widget_options = [], $control_options = [] ) {
		/**
		 * For backwards compatibility purposes alone.
		 * @todo remove after 2021-08-01
		 */
		$this->slug = static::get_widget_slug();

		parent::__construct(
			$this->parse_id_base( $id_base ),
			$this->parse_name( $name ),
			$this->parse_widget_options( $widget_options ),
			$this->parse_control_options( $control_options )
		);
	}