From 8da17b946034f48d80f585bff8f8c0db8e629f50 Mon Sep 17 00:00:00 2001
From: Mikhail Bodrov <bodrovmiha@yandex.ru>
Date: Wed, 6 Nov 2019 10:20:40 +0200
Subject: [PATCH] jest-transform: Fix optional type for getCacheKey in
 transform (#9138)

---
 packages/jest-transform/src/types.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/jest-transform/src/types.ts b/packages/jest-transform/src/types.ts
index 636cff4c27e2..42e60a3420f0 100644
--- a/packages/jest-transform/src/types.ts
+++ b/packages/jest-transform/src/types.ts
@@ -56,7 +56,7 @@ export interface Transformer {
   canInstrument?: boolean;
   createTransformer?: (options?: any) => Transformer;
 
-  getCacheKey: (
+  getCacheKey?: (
     fileData: string,
     filePath: Config.Path,
     configStr: string,