From 66a1027be100598ed1ea13067bd2dddb5bf598c8 Mon Sep 17 00:00:00 2001
From: Taylor Yelverton <taylor.yelverton@nuance.com>
Date: Fri, 25 Oct 2019 15:13:42 -0500
Subject: [PATCH] ActionCable: Subscriptions.create obj is optional. (#39406)

- https://guides.rubyonrails.org/action_cable_overview.html#subscriber
- https://guides.rubyonrails.org/action_cable_overview.html#client-server-interactions-subscriptions
- https://github.com/rails/rails/blob/master/actioncable/app/javascript/action_cable/subscription.js#L59-L67
---
 types/actioncable/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/actioncable/index.d.ts b/types/actioncable/index.d.ts
index a48c379c26..d0e2216e73 100644
--- a/types/actioncable/index.d.ts
+++ b/types/actioncable/index.d.ts
@@ -13,7 +13,7 @@ declare module ActionCable {
   }
 
   interface Subscriptions {
-    create(channel: string|ChannelNameWithParams, obj: CreateMixin): Channel;
+    create(channel: string|ChannelNameWithParams, obj?: CreateMixin): Channel;
   }
 
   interface Cable {