From d66484822bafaa7934145ee6d9ab4c01d157575a Mon Sep 17 00:00:00 2001
From: Adam Ernst <adamjernst@fb.com>
Date: Tue, 21 Apr 2020 11:51:02 -0700
Subject: [PATCH] Allow subdescriptors to return nil to signal no data

Summary: Currently subdescriptors are *always* rendered. Allow them to return `nil` to signal that they don't need to be rendered.

Reviewed By: cuva

Differential Revision: D21157249

fbshipit-source-id: 68a83424efc50723e1ec71c069feef8e10037671
---
 .../SKComponentLayoutDescriptor.mm                           | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKComponentLayoutDescriptor.mm b/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKComponentLayoutDescriptor.mm
index 36425a5c0..01952afb8 100644
--- a/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKComponentLayoutDescriptor.mm
+++ b/iOS/Plugins/FlipperKitLayoutPlugin/FlipperKitLayoutComponentKitSupport/SKComponentLayoutDescriptor.mm
@@ -102,7 +102,10 @@ static std::vector<std::pair<NSString*, SKSubDescriptor>>& subDescriptors() {
       [[NSMutableDictionary alloc] init];
 
   for (const auto& pair : subDescriptors()) {
-    [extraData setObject:pair.second(node) forKey:pair.first];
+    NSString* value = pair.second(node);
+    if (value) {
+      [extraData setObject:value forKey:pair.first];
+    }
   }
   if (extraData.count > 0) {
     [data addObject:[SKNamed newWithName:@"Extra Sections"