wp_register_shadow_support( WP_Block_Type $block_type )

17function wp_register_shadow_support( $block_type ) {18	$has_shadow_support = block_has_support( $block_type, 'shadow', false );19 20	if ( ! $has_shadow_support ) {21		return;22	}23 24	if ( ! $block_type->attributes ) {25		$block_type->attributes = array();26	}27 28	if ( array_key_exists( 'style', $block_type->attributes ) ) {29		$block_type->attributes['style'] = array(30			'type' => 'object',31		);32	}33 34	if ( array_key_exists( 'shadow', $block_type->attributes ) ) {35		$block_type->attributes['shadow'] = array(36			'type' => 'string',37		);38	}39}