From 67fec912efb904dbd07c67ff71d4e747bf61a02f Mon Sep 17 00:00:00 2001
From: John Wright <johngeorge.wright@gmail.com>
Date: Sun, 6 Nov 2016 11:16:10 +0000
Subject: [PATCH] feat: specify events in event handlers

---
 doubleclick-gpt/index.d.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/doubleclick-gpt/index.d.ts b/doubleclick-gpt/index.d.ts
index faadd82aff..04a1e8b50b 100644
--- a/doubleclick-gpt/index.d.ts
+++ b/doubleclick-gpt/index.d.ts
@@ -23,7 +23,10 @@ declare namespace googletag {
     }
 
     export interface Service {
-        addEventListener(eventType: string, listener: Function): void;
+        addEventListener(
+          eventType: string,
+            listener: (event: events.ImpressionViewableEvent | events.SlotOnloadEvent | events.SlotRenderEndedEvent | events.slotVisibilityChangedEvent) => void
+        ): void;
     }
 
     export interface CompanionAdsService extends Service {