From faec3b58b7d85378be5058bbafe03aae1279ea33 Mon Sep 17 00:00:00 2001
From: Matt Bierner <matb@microsoft.com>
Date: Tue, 8 May 2018 13:45:38 -0700
Subject: [PATCH] Mark fields readonly

---
 .../src/typescriptServiceClient.ts                          | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/extensions/typescript-language-features/src/typescriptServiceClient.ts b/extensions/typescript-language-features/src/typescriptServiceClient.ts
index 7335308f976..f16d2f035ce 100644
--- a/extensions/typescript-language-features/src/typescriptServiceClient.ts
+++ b/extensions/typescript-language-features/src/typescriptServiceClient.ts
@@ -35,9 +35,9 @@ import { TypeScriptPluginPathsProvider } from './utils/pluginPathsProvider';
 const localize = nls.loadMessageBundle();
 
 interface CallbackItem {
-	c: (value: any) => void;
-	e: (err: any) => void;
-	start: number;
+	readonly c: (value: any) => void;
+	readonly e: (err: any) => void;
+	readonly start: number;
 }
 
 class CallbackMap {