[NTG-context] Rotate text in TABLE-header

Dear list, is there an easy option to rotate all text (not the table itself) in the first row of a TABLE? something like this: \bTABLE \bTR[rotate=90] \bTD I am flipped \eTD \bTD Me too. \eTD \bTD Same here! \eTD \eTR \eTABLE That would be super useful, but I didn't find anything.