abox[] $metaboxes Metaboxes.
		 *
		 * @since 4.1.3
		 */
		$metaboxes = apply_filters( 'flexible-shipping/page/info/metaboxes', $metaboxes );

		$metaboxes = array_filter(
			$metaboxes,
			function ( $metabox ) {
				return $metabox instanceof Metabox;
			}
		);

		return $metaboxes;
	}
}