From 439b10e10da4d0364b800a472c7f81992bd56a16 Mon Sep 17 00:00:00 2001
From: Pierric Cistac <Pierrci@users.noreply.github.com>
Date: Thu, 21 Mar 2019 13:07:08 -0400
Subject: [PATCH] fix(angular): overlay.getTop can return undefined (#17802)

---
 angular/src/util/overlay.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/angular/src/util/overlay.ts b/angular/src/util/overlay.ts
index 733c899491..56f0cac0b7 100644
--- a/angular/src/util/overlay.ts
+++ b/angular/src/util/overlay.ts
@@ -20,7 +20,7 @@ export class OverlayBaseController<Opts, Overlay> {
   /**
    * Returns the top overlay.
    */
-  getTop(): Promise<Overlay> {
+  getTop(): Promise<Overlay | undefined> {
     return proxyMethod(this.ctrl, this.doc, 'getTop');
   }
 }