From a2dbe4900e6b9ecd0eccde6f60d95bf4d4eca09a Mon Sep 17 00:00:00 2001
From: Pascal Bugnion <pascal@bugnion.org>
Date: Wed, 8 Jan 2020 17:05:29 +0000
Subject: [PATCH] Add comment explaining use of dummy serializer

---
 packages/controls/src/widget_upload.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/controls/src/widget_upload.ts b/packages/controls/src/widget_upload.ts
index f9cd3eefe6..6abba4a722 100644
--- a/packages/controls/src/widget_upload.ts
+++ b/packages/controls/src/widget_upload.ts
@@ -27,6 +27,7 @@ export class FileUploadModel extends CoreDOMWidgetModel {
 
     static serializers = {
         ...CoreDOMWidgetModel.serializers,
+        // use a dummy serializer for value to circumvent the default serializer.
         value: { serialize: (x: any) => x },
     };
 }