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/useTimeout/useTimeout.js

@@ -0,0 +1,36 @@
+'use client';
+
+import useLazyRef from '../useLazyRef/useLazyRef';
+import useOnMount from '../useOnMount/useOnMount';
+export class Timeout {
+  constructor() {
+    this.currentId = null;
+    this.clear = () => {
+      if (this.currentId !== null) {
+        clearTimeout(this.currentId);
+        this.currentId = null;
+      }
+    };
+    this.disposeEffect = () => {
+      return this.clear;
+    };
+  }
+  static create() {
+    return new Timeout();
+  }
+  /**
+   * Executes `fn` after `delay`, clearing any previously scheduled call.
+   */
+  start(delay, fn) {
+    this.clear();
+    this.currentId = setTimeout(() => {
+      this.currentId = null;
+      fn();
+    }, delay);
+  }
+}
+export default function useTimeout() {
+  const timeout = useLazyRef(Timeout.create).current;
+  useOnMount(timeout.disposeEffect);
+  return timeout;
+}