From 190bcc89c115ef1d0db898c3ced032dac25d8ae3 Mon Sep 17 00:00:00 2001
From: PatrickJS <github@gdi2290.com>
Date: Fri, 22 Jul 2016 10:19:57 -0700
Subject: [PATCH] refactor(EventEmitter): optional emits (#10058)

the Subject#next is optional
---
 modules/@angular/facade/src/async.ts   | 2 +-
 tools/public_api_guard/core/index.d.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/@angular/facade/src/async.ts b/modules/@angular/facade/src/async.ts
index 1d502b4de4..7909d20010 100644
--- a/modules/@angular/facade/src/async.ts
+++ b/modules/@angular/facade/src/async.ts
@@ -130,7 +130,7 @@ export class EventEmitter<T> extends Subject<T> {
     this.__isAsync = isAsync;
   }
 
-  emit(value: T) { super.next(value); }
+  emit(value?: T) { super.next(value); }
 
   /**
    * @deprecated - use .emit(value) instead
diff --git a/tools/public_api_guard/core/index.d.ts b/tools/public_api_guard/core/index.d.ts
index 3a68256e3c..f5ec7385bd 100644
--- a/tools/public_api_guard/core/index.d.ts
+++ b/tools/public_api_guard/core/index.d.ts
@@ -715,7 +715,7 @@ export declare function enableProdMode(): void;
 export declare class EventEmitter<T> extends Subject<T> {
     __isAsync: boolean;
     constructor(isAsync?: boolean);
-    emit(value: T): void;
+    emit(value?: T): void;
     /** @deprecated */ next(value: any): void;
     subscribe(generatorOrNext?: any, error?: any, complete?: any): any;
 }