``` % pandoc -t native ::: {.foo}
hi
::: ^D [ Div ( "", [ "foo" ], [] ) [ RawBlock ( Format "html" ) "" , RawBlock ( Format "html" ) "" , RawBlock ( Format "html" ) "" , RawBlock ( Format "html" ) "" , RawBlock ( Format "html" ) "
" , Plain [ Str "hi" ] , RawBlock ( Format "html" ) "
" ] ] ```