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/ClassNameGenerator/ClassNameGenerator.js

@@ -0,0 +1,17 @@
+const defaultGenerator = componentName => componentName;
+const createClassNameGenerator = () => {
+  let generate = defaultGenerator;
+  return {
+    configure(generator) {
+      generate = generator;
+    },
+    generate(componentName) {
+      return generate(componentName);
+    },
+    reset() {
+      generate = defaultGenerator;
+    }
+  };
+};
+const ClassNameGenerator = createClassNameGenerator();
+export default ClassNameGenerator;