--- a/wp/wp-includes/js/wp-backbone.js	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/js/wp-backbone.js	Mon Oct 14 17:39:30 2019 +0200
@@ -1,7 +1,12 @@
+/** @namespace wp */
 window.wp = window.wp || {};
 
 (function ($) {
-	// Create the WordPress Backbone namespace.
+	/**
+	 * Create the WordPress Backbone namespace.
+	 *
+	 * @namespace wp.Backbone
+	 */
 	wp.Backbone = {};
 
 
@@ -21,7 +26,7 @@
 		//
 		// Returns an array of all subviews.
 		all: function() {
-			return _.flatten( this._views );
+			return _.flatten( _.values( this._views ) ); 
 		},
 
 		// ### Get a selector's subviews