Multiple header rows

[VolkerZiemann]

Hey. Thanks for the awesome reactable package. Is there a way to add multiple headers. ColumnGroup() allows for one additional header but how do I add a ColumnGroup of a ColumnGroup (example here: https://community.rstudio.com/t/how-to-add-multiple-header-to-the-table/98566). With flextable this works with add_header_row but there is no such function in reactable if I understand correctly...

Thanks!