From 8f7784afa1e086ecae2f5de3bb78e550e34f7216 Mon Sep 17 00:00:00 2001
From: cailenmusselman <cailenmusselman@gmail.com>
Date: Fri, 24 Mar 2017 09:08:26 -0600
Subject: [PATCH] Context passed to EventEmitter.addListener() should be
 optional. (#15353)

As suggested in the already existing comments above the declaration.

And as specified in the react-native source:

https://github.com/facebook/react-native/blob/master/Libraries/EventEmitter/EventEmitter.js#L60-L64
---
 react-native/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/react-native/index.d.ts b/react-native/index.d.ts
index 11d0c4478b..c06d5b67b4 100644
--- a/react-native/index.d.ts
+++ b/react-native/index.d.ts
@@ -149,7 +149,7 @@ interface EventEmitterListener {
      * @param {*} context - Optional context object to use when invoking the
      *   listener
      */
-    addListener(eventType: string, listener: (...args: any[]) => any, context: any): EmitterSubscription
+    addListener(eventType: string, listener: (...args: any[]) => any, context?: any): EmitterSubscription
 }
 
 interface EventEmitter extends EventEmitterListener {