diff --git a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.h b/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.h
index 95cb30924..d2045d2a3 100644
--- a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.h
+++ b/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.h
@@ -13,5 +13,8 @@
  A SKSubDescriptor is a function which knows how to expose additional data
  to SKLayoutDescriptor. This class is for frameworks wanting to pass data
  along through the Layout Descriptor.
+
+ The infra expects that the string returned is a JSON string.
+ For example: @"{\'key\': 5}"
  */
 typedef NSString* (*SKSubDescriptor)(SKComponentLayoutWrapper* node);
diff --git a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.mm b/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.mm
deleted file mode 100644
index 8ecfd7c25..000000000
--- a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKSubDescriptor.mm
+++ /dev/null
@@ -1,6 +0,0 @@
-/*
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */