[NTG-context] \typefile from n-th line

Hello, I'd need to \typefile a file from n-th line (= ignoring first n-1 lines). Is there such an option for \typefile macro? (http://wiki.contextgarden.net/Reference/en/typefile is silent.) I tried: \typefile[default][lines={10}]{a_file.txt} % Start at line 10 \typefile[default][lines={10,+1}]{a_file.txt} % Start at line 10, step = 1 \typefile[default][start=10]{a_file.txt} % Start at line 10 \typefile[default][from=10]{a_file.txt} % Start at line 10 No success. (The last Ctx minimals, WinXP.) Lukas