public function list_( $args, $assoc_args ) {
		global $wp_registered_sidebars;

		Utils\wp_register_unused_sidebar();

		if ( ! empty( $assoc_args['format'] ) && 'ids' === $assoc_args['format'] ) {
			$sidebars = wp_list_pluck( $wp_registered_sidebars, 'id' );
		} else {
			$sidebars = $wp_registered_sidebars;
		}

		$formatter = new Formatter( $assoc_args, $this->fields );
		$formatter->display_items( $sidebars );
	}