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/material/styles/styled.js

@@ -0,0 +1,14 @@
+'use client';
+
+import createStyled from '@mui/system/createStyled';
+import defaultTheme from './defaultTheme';
+import THEME_ID from './identifier';
+import rootShouldForwardProp from './rootShouldForwardProp';
+export { default as slotShouldForwardProp } from './slotShouldForwardProp';
+export { default as rootShouldForwardProp } from './rootShouldForwardProp';
+const styled = createStyled({
+  themeId: THEME_ID,
+  defaultTheme,
+  rootShouldForwardProp
+});
+export default styled;