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/CharacterSheet/components/ContentGroup/ContentGroup.tsx

@@ -0,0 +1,23 @@
+import React from "react";
+
+interface Props {
+  header: React.ReactNode;
+  extra?: React.ReactNode;
+}
+const ContentGroup: React.FC<Props> = ({ header, extra, children }) => {
+  return (
+    <div className="ct-content-group">
+      {header && (
+        <div className="ct-content-group__header">
+          <div className="ct-content-group__header-content">{header}</div>
+          {extra && (
+            <div className="ct-content-group__header-extra">{extra}</div>
+          )}
+        </div>
+      )}
+      <div className="ct-content-group__content">{children}</div>
+    </div>
+  );
+};
+
+export default ContentGroup;

ddb_main/tools/js/CharacterSheet/components/ContentGroup/index.ts

@@ -0,0 +1,4 @@
+import ContentGroup from "./ContentGroup";
+
+export default ContentGroup;
+export { ContentGroup };