Data Driven Classes and Styles Example failing with Typescript

[Nedu]

I am trying to style cells using data driven classes and styles but I am also using TypeScript. I used the example in the guide and I get this typescript error Property 'className' does not exist on type 'HeaderGroup<object>' I have included my code in this sandbox, if it helps https://codesandbox.io/s/headerstyling-nus98?file=/src/App.tsx