It does not make sense to have repeated field for the line index of those commands. Users want either doing it on one specific line or the whole track. If users want to do it on multiple line (but not every line), users can do it with multiple commands instead, but still it is very unlikely.
It does not make sense to have repeated field for the line index of those commands. Users want either doing it on one specific line or the whole track. If users want to do it on multiple line (but not every line), users can do it with multiple commands instead, but still it is very unlikely.