From 46a4c4b875e9e30e9f38c29f9379a6c903c67600 Mon Sep 17 00:00:00 2001
From: Simon Woolf <simon@ably.io>
Date: Fri, 20 Sep 2019 17:33:56 +0100
Subject: [PATCH] Further tweak to once typings (event optional with promises)

---
 ably.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ably.d.ts b/ably.d.ts
index bfc0a21bfc..d478cc59b6 100644
--- a/ably.d.ts
+++ b/ably.d.ts
@@ -360,7 +360,7 @@ declare namespace Types {
 		on(eventOrCallback: EventType | EventType[] | CallbackType, callback?: CallbackType): void;
 		once(event: EventType, callback: CallbackType): void;
 		once(callback: CallbackType): void;
-		once(event: EventType): Promise<ResultType>;
+		once(event?: EventType): Promise<ResultType>;
 		off(eventOrCallback?: EventType | CallbackType, callback?: CallbackType): void;
 		listeners(eventName?: EventType): CallbackType[] | null;
 	}