From d0482b4eed640d4ad7bacbab2456a647e4a0df20 Mon Sep 17 00:00:00 2001
From: Jaewon Seo <byeol@hotmail.co.kr>
Date: Tue, 30 Jan 2018 17:00:00 -0800
Subject: [PATCH] Correct the type signature of DeltaDocumentSnapshot

---
 src/providers/firestore.ts | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/providers/firestore.ts b/src/providers/firestore.ts
index 9dac368eb..a1d8f00bf 100644
--- a/src/providers/firestore.ts
+++ b/src/providers/firestore.ts
@@ -70,12 +70,12 @@ export class NamespaceBuilder {
 
 export interface DeltaDocumentSnapshot {
   exists: Boolean;
-  ref: any;
+  ref: firebase.firestore.DocumentReference;
   id: string;
-  createTime: string;
-  updateTime: string;
-  readTime: string;
-  previous: any;
+  createTime?: string;
+  updateTime?: string;
+  readTime?: string;
+  previous: DeltaDocumentSnapshot;
   data: () => any;
   get: (key: string) => any;
 };