Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/node_modules/react-redux/es/index.js

@@ -0,0 +1,7 @@
+export * from './exports';
+import { unstable_batchedUpdates as batch } from './utils/reactBatchedUpdates';
+import { setBatch } from './utils/batch'; // Enable batched updates in our subscriptions for use
+// with standard React renderers (ReactDOM, React Native)
+
+setBatch(batch);
+export { batch };