diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/class-wp-customize-control.php
--- a/wp/wp-includes/class-wp-customize-control.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/class-wp-customize-control.php	Wed Sep 21 18:19:35 2022 +0200
@@ -60,7 +60,7 @@
 	 * The primary setting for the control (if there is one).
 	 *
 	 * @since 3.4.0
-	 * @var string
+	 * @var string|WP_Customize_Setting|null
 	 */
 	public $setting = 'default';
 
@@ -795,3 +795,8 @@
  * WP_Customize_Date_Time_Control class.
  */
 require_once ABSPATH . WPINC . '/customize/class-wp-customize-date-time-control.php';
+
+/**
+ * WP_Sidebar_Block_Editor_Control class.
+ */
+require_once ABSPATH . WPINC . '/customize/class-wp-sidebar-block-editor-control.php';