Fix AnalyticsMock
diff --git a/lib/usage.dart b/lib/usage.dart
index d30b105..5755b61 100644
--- a/lib/usage.dart
+++ b/lib/usage.dart
@@ -294,9 +294,9 @@
   }
 
   @override
-  Future<T> withBatching<T>(FutureOr<T> Function() callback) {
-    // TODO: implement withBatching
-    throw UnimplementedError();
+  Future<T> withBatching<T>(FutureOr<T> Function() callback,
+      {int maxEventsPerBatch = 20}) async {
+    return await callback();
   }
 }