From 0b9cb255b954886b0f100e966c2ddb841c91015e Mon Sep 17 00:00:00 2001
From: Tabeth Nkangoh <tabeth@tabeth.com>
Date: Fri, 16 Feb 2018 10:29:38 -0500
Subject: [PATCH] Update index.d.ts

There appears to be a discrepancy between the description in the comments as well as [the documentation](https://www.emberjs.com/api/ember/3.0/classes/MutableArray/methods/removeAt?anchor=removeAt) and the typing itself. Since we can pass either a single index **or** a start and length, `len` should be an optional parameter (to handle the scenario where you just pass a single index).
---
 types/ember/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/ember/index.d.ts b/types/ember/index.d.ts
index 4a3d7d45d1..9f08d2fc24 100755
--- a/types/ember/index.d.ts
+++ b/types/ember/index.d.ts
@@ -1523,7 +1523,7 @@ declare module 'ember' {
              * Remove an object at the specified index using the `replace()` primitive
              * method. You can pass either a single index, or a start and a length.
              */
-            removeAt(start: number, len: number): this;
+            removeAt(start: number, len?: number): this;
             /**
              * Push the object onto the end of the array. Works just like `push()` but it
              * is KVO-compliant.