_inject_theme_attribute_in_block_template_content( string $template_content ): string

6061function _inject_theme_attribute_in_block_template_content( $template_content ) {6062	_deprecated_function(6063		__FUNCTION__,6064		'6.4.0',6065		'traverse_and_serialize_blocks( parse_blocks( $template_content ), "_inject_theme_attribute_in_template_part_block" )'6066	);6067 6068	$has_updated_content = false;6069	$new_content         = '';6070	$template_blocks     = parse_blocks( $template_content );6071 6072	$blocks = _flatten_blocks( $template_blocks );6073	foreach ( $blocks as &$block ) {6074		if (6075			'core/template-part' === $block['blockName'] &&6076			! isset( $block['attrs']['theme'] )6077		) {6078			$block['attrs']['theme'] = get_stylesheet();6079			$has_updated_content     = true;6080		}6081	}6082 6083	if ( $has_updated_content ) {6084		foreach ( $template_blocks as &$block ) {6085			$new_content .= serialize_block( $block );6086		}6087 6088		return $new_content;6089	}6090 6091	return $template_content;6092}