From d7a6c95464ead9e9855dfc590c5908ca994a0d6a Mon Sep 17 00:00:00 2001
From: Christopher Chedeau <vjeuxx@gmail.com>
Date: Tue, 5 Jul 2016 09:18:49 -0700
Subject: [PATCH] [flow] fix flattenChildren type (#7110)

Summary:
Make the debug attribute optional

Test Plan:
npm run flow

Reviewers: @keyanzhang @chicoxyzzy
(cherry picked from commit 07cfba17a9902e9072b9b73c17a375b2f6b53817)
---
 src/shared/utils/flattenChildren.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/shared/utils/flattenChildren.js b/src/shared/utils/flattenChildren.js
index afb12d5a46..bd9d07ece6 100644
--- a/src/shared/utils/flattenChildren.js
+++ b/src/shared/utils/flattenChildren.js
@@ -27,7 +27,7 @@ function flattenSingleChildIntoContext(
   traverseContext: mixed,
   child: ReactElement<any>,
   name: string,
-  selfDebugID: number
+  selfDebugID?: number,
 ): void {
   // We found a component instance.
   if (traverseContext && typeof traverseContext === 'object') {
@@ -54,7 +54,10 @@ function flattenSingleChildIntoContext(
  * children will not be included in the resulting object.
  * @return {!object} flattened children keyed by name.
  */
-function flattenChildren(children: ReactElement<any>, selfDebugID: number): ?{ [name: string]: ReactElement<any> } {
+function flattenChildren(
+  children: ReactElement<any>,
+  selfDebugID?: number,
+): ?{ [name: string]: ReactElement<any> } {
   if (children == null) {
     return children;
   }