Grabbed dndbeyond's source code

```
~/go/bin/sourcemapper -output ddb -jsurl https://media.dndbeyond.com/character-app/static/js/main.90aa78c5.js
```

ddb_main/tools/js/CharacterBuilder/components/Button/Button.tsx

@@ -0,0 +1,34 @@
+import React from "react";
+
+import { Button } from "@dndbeyond/character-components/es";
+
+interface withBuilderProps {
+  clsNames: Array<string>;
+}
+function withBuilderButton<P extends object, C>(
+  WrappedComponent: React.JSXElementConstructor<P> & C
+) {
+  type Props = JSX.LibraryManagedAttributes<C, P>;
+  return class WithBuilderButton extends React.PureComponent<
+    Props & withBuilderProps
+  > {
+    static defaultProps = {
+      clsNames: [],
+    };
+
+    render() {
+      const { children, clsNames } = this.props;
+
+      return (
+        <WrappedComponent
+          {...(this.props as any)}
+          clsNames={[...clsNames, "builder-button"]}
+        >
+          {children}
+        </WrappedComponent>
+      );
+    }
+  };
+}
+
+export default withBuilderButton(Button);