[NTG-context] Columnspan in tabulate

Hi, is it possible to support columnspan in tabulate. \def\tabulateuse#1% {\dorecurse{\numexpr2*#1-1\relax}{\span}} \setuptabulate[inner=\let\use\tabulateuse\defineTABLEshorthands] \starttext \starttable[|l|l|l|l|] \NC a \NC b \NC c \NC d \AR \NC 1 \NC \TWO 2 \NC 4 \AR \stoptable \starttabulate[|l|Bl|l|l|] \NC a \NC b \NC c \NC d \NR \NC 1 \NC 2 \TWO \NC 4 \NR \stoptabulate \stoptext Wolfgang