From 8e56ee4c6f1f16402edd8abee9daa55678117466 Mon Sep 17 00:00:00 2001
From: bob <bcz@cs.brown.edu>
Date: Thu, 21 Feb 2019 13:44:58 -0500
Subject: everything works.

---
 src/client/util/UndoManager.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/client/util')

diff --git a/src/client/util/UndoManager.ts b/src/client/util/UndoManager.ts
index 8e9e11a11..edb75b55f 100644
--- a/src/client/util/UndoManager.ts
+++ b/src/client/util/UndoManager.ts
@@ -25,7 +25,7 @@ function propertyDecorator(target: any, key: string | symbol) {
         }
     })
 }
-export function undoBatch(target: any, key: string | symbol, descriptor: TypedPropertyDescriptor<any>): any {
+export function undoBatch(target: any, key: string | symbol, descriptor?: TypedPropertyDescriptor<any>): any {
     if (!descriptor) {
         propertyDecorator(target, key);
         return;
-- 
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