From b835e90560beec28cdaac108b0df12bd0482e7ed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20D=C3=B6brei?=
 <gabordobrei@users.noreply.github.com>
Date: Mon, 15 Apr 2019 15:53:11 +0200
Subject: [PATCH] make transformLabels optional in index.d.ts

---
 index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.d.ts b/index.d.ts
index c92d4a4..c905f55 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -24,7 +24,7 @@ interface Opts {
   normalizePath?: NormalizePathRegexs;
   formatStatusCode?: (res: express.Response) => number | string;
 
-  transformLabels: (
+  transformLabels?: (
     labels: Labels,
     req: express.Request,
     res: express.Response