wp_render_block_style_variation_support_styles( array $parsed_block ): array

81function wp_render_block_style_variation_support_styles( $parsed_block ) {82	$classes    = $parsed_block['attrs']['className'] ?? null;83	$variations = wp_get_block_style_variation_name_from_class( $classes );84 85	if ( ! $variations ) {86		return $parsed_block;87	}88 89	$tree       = WP_Theme_JSON_Resolver::get_merged_data();90	$theme_json = $tree->get_raw_data();91 92	// Only the first block style variation with data is supported.93	$variation_data = array();94	foreach ( $variations as $variation ) {95		$variation_data = $theme_json['styles']['blocks'][ $parsed_block['blockName'] ]['variations'][ $variation ] ?? array();96 97		if ( ! empty( $variation_data ) ) {98			break;99		}100	}101 102	if ( empty( $variation_data ) ) {103		return $parsed_block;104	}105 106	/*107	 * Recursively resolve any ref values with the appropriate value within the108	 * theme_json data.109	 */110	wp_resolve_block_style_variation_ref_values( $variation_data, $theme_json );111 112	$variation_instance = wp_unique_id( $variation . '--' );113	$class_name         = "is-style-$variation_instance";114	$updated_class_name = $parsed_block['attrs']['className'] . " $class_name";115 116	/*117	 * Even though block style variations are effectively theme.json partials,118	 * they can't be processed completely as though they are.119	 *120	 * Block styles support custom selectors to direct specific types of styles121	 * to inner elements. For example, borders on Image block's get applied to122	 * the inner `img` element rather than the wrapping `figure`.123	 *124	 * The following relocates the "root" block style variation styles to125	 * under an appropriate blocks property to leverage the preexisting style126	 * generation for simple block style variations. This way they get the127	 * custom selectors they need.128	 *129	 * The inner elements and block styles for the variation itself are130	 * still included at the top level but scoped by the variation's selector131	 * when the stylesheet is generated.132	 */133	$elements_data = $variation_data['elements'] ?? array();134	$blocks_data   = $variation_data['blocks'] ?? array();135	unset( $variation_data['elements'] );136	unset( $variation_data['blocks'] );137 138	_wp_array_set(139		$blocks_data,140		array( $parsed_block['blockName'], 'variations', $variation_instance ),141		$variation_data142	);143 144	$config = array(145		'version' => WP_Theme_JSON::LATEST_SCHEMA,146		'styles'  => array(147			'elements' => $elements_data,148			'blocks'   => $blocks_data,149		),150	);151 152	// Turn off filter that excludes block nodes. They are needed here for the variation's inner block types.153	if ( ! is_admin() ) {154		remove_filter( 'wp_theme_json_get_style_nodes', 'wp_filter_out_block_nodes' );155	}156 157	// Temporarily prevent variation instance from being sanitized while processing theme.json.158	$styles_registry = WP_Block_Styles_Registry::get_instance();159	$styles_registry->register( $parsed_block['blockName'], array( 'name' => $variation_instance ) );160