_get_block_template_file( string $template_type, string $slug ): array|null

323function _get_block_template_file( $template_type, $slug ) {324	if ( 'wp_template' !== $template_type && 'wp_template_part' !== $template_type ) {325		return null;326	}327 328	$themes = array(329		get_stylesheet() => get_stylesheet_directory(),330		get_template()   => get_template_directory(),331	);332	foreach ( $themes as $theme_slug => $theme_dir ) {333		$template_base_paths = get_block_theme_folders( $theme_slug );334		$file_path           = $theme_dir . '/' . $template_base_paths[ $template_type ] . '/' . $slug . '.html';335		if ( file_exists( $file_path ) ) {336			$new_template_item = array(337				'slug'  => $slug,338				'path'  => $file_path,339				'theme' => $theme_slug,340				'type'  => $template_type,341			);342 343			if ( 'wp_template_part' === $template_type ) {344				return _add_block_template_part_area_info( $new_template_item );345			}346 347			if ( 'wp_template' === $template_type ) {348				return _add_block_template_info( $new_template_item );349			}350 351			return $new_template_item;352		}353	}354 355	return null;356}