Grabbed dndbeyond's source code

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

ddb_main/webpack/runtime/ensure chunk

@@ -0,0 +1,9 @@
+__webpack_require__.f = {};
+// This file contains only the entry chunk.
+// The chunk loading function for additional chunks
+__webpack_require__.e = (chunkId) => {
+	return Promise.all(Object.keys(__webpack_require__.f).reduce((promises, key) => {
+		__webpack_require__.f[key](chunkId, promises);
+		return promises;
+	}, []));
+};