From b3ddbbd298019c6d81abd8d138858c9a7911765e Mon Sep 17 00:00:00 2001
From: Sam Zhou <samzhou19815@meta.com>
Date: Wed, 4 Sep 2024 13:04:32 -0700
Subject: [PATCH] Replace $ObjMap in EventEmitter with mapped type

Summary: Changelog: [Internal]

Differential Revision: D62199703
---
 .../Libraries/vendor/emitter/EventEmitter.js           | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/packages/react-native/Libraries/vendor/emitter/EventEmitter.js b/packages/react-native/Libraries/vendor/emitter/EventEmitter.js
index 6aaad2ea4db146..1087654ea57827 100644
--- a/packages/react-native/Libraries/vendor/emitter/EventEmitter.js
+++ b/packages/react-native/Libraries/vendor/emitter/EventEmitter.js
@@ -35,11 +35,9 @@ interface Registration<TArgs> {
   +remove: () => void;
 }
 
-// $FlowFixMe[deprecated-type]
-type Registry<TEventToArgsMap: {...}> = $ObjMap<
-  TEventToArgsMap,
-  <TArgs>(TArgs) => Set<Registration<TArgs>>,
->;
+type Registry<TEventToArgsMap: {...}> = {
+  [K in keyof TEventToArgsMap]: Set<Registration<TEventToArgsMap[K]>>,
+};
 
 /**
  * EventEmitter manages listeners and publishes events to them.
@@ -64,6 +62,7 @@ type Registry<TEventToArgsMap: {...}> = $ObjMap<
 export default class EventEmitter<TEventToArgsMap: {...}>
   implements IEventEmitter<TEventToArgsMap>
 {
+  // $FlowFixMe[incompatible-type]
   #registry: Registry<TEventToArgsMap> = {};
 
   /**
@@ -126,6 +125,7 @@ export default class EventEmitter<TEventToArgsMap: {...}>
     eventType?: ?TEvent,
   ): void {
     if (eventType == null) {
+      // $FlowFixMe[incompatible-type]
       this.#registry = {};
     } else {
       delete this.#registry[eventType];