Grabbed dndbeyond's source code

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

ddb_main/tools/js/smartComponents/Collapsible/index.ts

@@ -0,0 +1,12 @@
+import Collapsible from "./Collapsible";
+import CollapsibleHeaderCallout from "./CollapsibleHeaderCallout";
+import CollapsibleHeaderContent from "./CollapsibleHeaderContent";
+import CollapsibleHeading from "./CollapsibleHeading";
+
+export default Collapsible;
+export {
+  Collapsible,
+  CollapsibleHeading,
+  CollapsibleHeaderContent,
+  CollapsibleHeaderCallout,
+};