\expandafter\def\expandafter\@mkpream\expandafter#\expandafter1%
\expandafter{%
\expandafter\let\expandafter\CT@setup\expandafter\relax
\expandafter\let\expandafter\CT@color\expandafter\relax
\expandafter\let\expandafter\CT@do@color\expandafter\relax
\expandafter\let\expandafter\color\expandafter\relax
\expandafter\let\expandafter\CT@column@color\expandafter\relax
\expandafter\let\expandafter\CT@row@color\expandafter\relax
\expandafter\let\expandafter\CT@cell@color\expandafter\relax