From 05498be4410d7eaca3a3fb6a0ff0d352c9861597 Mon Sep 17 00:00:00 2001
From: Ika <ikatyang@gmail.com>
Date: Tue, 23 May 2017 06:58:35 +0800
Subject: [PATCH] Add missing undefined type (#15999)

---
 src/compiler/factory.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 965cb5fdda5..2b41f13f8a4 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1631,14 +1631,14 @@ namespace ts {
             : node;
     }
 
-    export function createImportClause(name: Identifier, namedBindings: NamedImportBindings): ImportClause {
+    export function createImportClause(name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause {
         const node = <ImportClause>createSynthesizedNode(SyntaxKind.ImportClause);
         node.name = name;
         node.namedBindings = namedBindings;
         return node;
     }
 
-    export function updateImportClause(node: ImportClause, name: Identifier, namedBindings: NamedImportBindings) {
+    export function updateImportClause(node: ImportClause, name: Identifier | undefined, namedBindings: NamedImportBindings | undefined) {
         return node.name !== name
             || node.namedBindings !== namedBindings
             ? updateNode(createImportClause(name, namedBindings), node)