From c6650f0b8313b9ab93cf8ce3a2badd7a03e8c997 Mon Sep 17 00:00:00 2001
From: Monica Kozbial <6621618+moniika@users.noreply.github.com>
Date: Wed, 21 Jul 2021 16:53:08 -0700
Subject: [PATCH] Remove need for require instead of requireType for Block in
 ASTNode (#5157)

---
 core/keyboard_nav/ast_node.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/keyboard_nav/ast_node.js b/core/keyboard_nav/ast_node.js
index 332e9af8c..d86a22a4c 100644
--- a/core/keyboard_nav/ast_node.js
+++ b/core/keyboard_nav/ast_node.js
@@ -418,7 +418,7 @@ Blockly.ASTNode.prototype.findPrevForField_ = function() {
  */
 Blockly.ASTNode.prototype.navigateBetweenStacks_ = function(forward) {
   var curLocation = this.getLocation();
-  if (!(curLocation instanceof Blockly.Block)) {
+  if (curLocation.getSourceBlock) {
     curLocation = /** @type {!Blockly.IASTNodeLocationWithBlock} */ (
       curLocation).getSourceBlock();
   }