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/ThemeProvider.js

@@ -0,0 +1,31 @@
+'use client';
+
+import _extends from "@babel/runtime/helpers/esm/extends";
+import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
+const _excluded = ["theme"];
+import * as React from 'react';
+import PropTypes from 'prop-types';
+import { ThemeProvider as SystemThemeProvider } from '@mui/system';
+import THEME_ID from './identifier';
+import { jsx as _jsx } from "react/jsx-runtime";
+export default function ThemeProvider(_ref) {
+  let {
+      theme: themeInput
+    } = _ref,
+    props = _objectWithoutPropertiesLoose(_ref, _excluded);
+  const scopedTheme = themeInput[THEME_ID];
+  return /*#__PURE__*/_jsx(SystemThemeProvider, _extends({}, props, {
+    themeId: scopedTheme ? THEME_ID : undefined,
+    theme: scopedTheme || themeInput
+  }));
+}
+process.env.NODE_ENV !== "production" ? ThemeProvider.propTypes = {
+  /**
+   * Your component tree.
+   */
+  children: PropTypes.node,
+  /**
+   * A theme object. You can provide a function to extend the outer theme.
+   */
+  theme: PropTypes.oneOfType([PropTypes.object, PropTypes.func]).isRequired
+} : void 0;