Amend callback in withSyncEvent instead of wrapping it.

docs/reference-guides/interactivity-api/api-reference.md

@@ -1258,7 +1258,7 @@ store( 'mySliderPlugin', {
 
 ### withSyncEvent()
 
-Actions that require synchronous access to the `event` object need to use the `withSyncEvent()` function to wrap their handler callback. This is necessary due to an ongoing effort to handle store actions asynchronously by default, unless they require synchronous event access. Therefore, as of Gutenberg `TODO: Add release number here!` / WordPress 6.8 all actions that require synchronous event access need to use the `withSyncEvent()` utility wrapper function. Otherwise a deprecation warning will be triggered, and in a future release the behavior will change accordingly.
+Actions that require synchronous access to the `event` object need to use the `withSyncEvent()` function to annotate their handler callback. This is necessary due to an ongoing effort to handle store actions asynchronously by default, unless they require synchronous event access. Therefore, as of Gutenberg `TODO: Add release number here!` / WordPress 6.8 all actions that require synchronous event access need to use the `withSyncEvent()` function. Otherwise a deprecation warning will be triggered, and in a future release the behavior will change accordingly.
 
 Only very specific event methods and properties require synchronous access, so it is advised to only use `withSyncEvent()` when necessary. The following event methods and properties require synchronous access:
 

packages/interactivity/src/utils.ts

@@ -397,21 +397,10 @@ export const isPlainObject = (
  * Indicates that the passed `callback` requires synchronous access to the event object.
  *
  * @param callback The event callback.
- * @return Wrapped event callback.
+ * @return Altered event callback.
  */
 export function withSyncEvent( callback: Function ): SyncAwareFunction {
-	let wrapped: SyncAwareFunction;
-
-	if ( callback?.constructor?.name === 'GeneratorFunction' ) {
-		wrapped = function* ( this: any, ...args: any[] ) {
-			yield* callback.apply( this, args );
-		};
-	} else {
-		wrapped = function ( this: any, ...args: any[] ) {
-			return callback.apply( this, args );
-		};
-	}
-
-	wrapped.sync = true;
-	return wrapped;
+	const syncAware = callback as SyncAwareFunction;
+	syncAware.sync = true;
+	return syncAware;
 }