apply_filters( 'gallery_style', string $gallery_style )

3027	 *              double for other themes.3028	 * @since 7.0.0 Removed the `type` attribute for any theme.3029	 *3030	 * @param string $gallery_style Default CSS styles and opening HTML div container3031	 *                              for the gallery shortcode output.3032	 */3033	$output = apply_filters( 'gallery_style', $gallery_style . $gallery_div );3034 3035	$i = 0;3036 3037	foreach ( $attachments as $id => $attachment ) {3038 3039		$attr = ( trim( $attachment->post_excerpt ) ) ? array( 'aria-describedby' => "$selector-$id" ) : '';