Table (with expandable rows) with fixed header and vertical scroll?

[SanjaySankar]

I'm working on a project and I need a table with :

1. 2 fixed headers,
2. expandable rows and
3. a vertical scroll on the body.

I have done the expandable rows part but can't find a way to fix the header and height without breaking the component.

**This is the codesandbox link for what I have now : https://codesandbox.io/s/vibrant-napier-h58np