From 74ecb9407879e768f75eb7515a9d610cf09af992 Mon Sep 17 00:00:00 2001
From: Sam El-Husseini <sam.elhusseini@gmail.com>
Date: Fri, 4 Oct 2019 13:06:58 -0700
Subject: [PATCH] Remove last instance of Object.assign (#3161)

---
 core/keyboard_nav/key_map.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/keyboard_nav/key_map.js b/core/keyboard_nav/key_map.js
index 2e0be2850..2491cbc5b 100644
--- a/core/keyboard_nav/key_map.js
+++ b/core/keyboard_nav/key_map.js
@@ -78,7 +78,9 @@ Blockly.user.keyMap.setKeyMap = function(keyMap) {
  * @package
  */
 Blockly.user.keyMap.getKeyMap = function() {
-  return Object.assign({}, Blockly.user.keyMap.map_);
+  var map = {};
+  Blockly.utils.object.mixin(map, Blockly.user.keyMap.map_);
+  return map;
 };
 
 /**