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/@mui/utils/useEnhancedEffect/useEnhancedEffect.js

@@ -0,0 +1,13 @@
+'use client';
+
+import * as React from 'react';
+
+/**
+ * A version of `React.useLayoutEffect` that does not show a warning when server-side rendering.
+ * This is useful for effects that are only needed for client-side rendering but not for SSR.
+ *
+ * Before you use this hook, make sure to read https://gist.github.com/gaearon/e7d97cdf38a2907924ea12e4ebdf3c85
+ * and confirm it doesn't apply to your use-case.
+ */
+const useEnhancedEffect = typeof window !== 'undefined' ? React.useLayoutEffect : React.useEffect;
+export default useEnhancedEffect;