diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/class-wp-block-template.php
--- a/wp/wp-includes/class-wp-block-template.php	Wed Sep 21 18:19:35 2022 +0200
+++ b/wp/wp-includes/class-wp-block-template.php	Tue Sep 27 16:37:53 2022 +0200
@@ -38,7 +38,7 @@
 	public $slug;
 
 	/**
-	 * Id.
+	 * ID.
 	 *
 	 * @since 5.8.0
 	 * @var string
@@ -78,10 +78,20 @@
 	public $source = 'theme';
 
 	/**
-	 * Post Id.
+	 * Origin of the content when the content has been customized.
+	 * When customized, origin takes on the value of source and source becomes
+	 * 'custom'.
+	 *
+	 * @since 5.9.0
+	 * @var string
+	 */
+	public $origin;
+
+	/**
+	 * Post ID.
 	 *
 	 * @since 5.8.0
-	 * @var integer|null
+	 * @var int|null
 	 */
 	public $wp_id;
 
@@ -97,7 +107,42 @@
 	 * Whether a template is, or is based upon, an existing template file.
 	 *
 	 * @since 5.8.0
-	 * @var boolean
+	 * @var bool
 	 */
 	public $has_theme_file;
+
+	/**
+	 * Whether a template is a custom template.
+	 *
+	 * @since 5.9.0
+	 *
+	 * @var bool
+	 */
+	public $is_custom = true;
+
+	/**
+	 * Author.
+	 *
+	 * A value of 0 means no author.
+	 *
+	 * @since 5.9.0
+	 * @var int
+	 */
+	public $author;
+
+	/**
+	 * Post types.
+	 *
+	 * @since 5.9.0
+	 * @var array
+	 */
+	public $post_types;
+
+	/**
+	 * Area.
+	 *
+	 * @since 5.9.0
+	 * @var string
+	 */
+	public $area;
 }