From 6c4e747295c65fed3d00efaf9c17a46deaa7271d Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Fri, 19 May 2017 14:13:33 -0700
Subject: [PATCH] Add `undefined` to return of getNameOfDeclaration

---
 src/compiler/utilities.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index cccabded02a..64f5445d3df 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -4700,7 +4700,7 @@ namespace ts {
         return identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ && identifier.charCodeAt(2) === CharacterCodes._ ? identifier.substr(1) : identifier;
     }
 
-    export function getNameOfDeclaration(declaration: Declaration): DeclarationName {
+    export function getNameOfDeclaration(declaration: Declaration): DeclarationName | undefined {
         if (!declaration) {
             return undefined;
         }