Overriding rules on a particular row

[dahosek]

Is there any way besides using, e.g., vline{1} = {2}{width=1pt} to override a rule on a particular row? As awkward as the tabular syntax of using \multicolumn for that purpose, it has the advantage of putting the formatting near the place where the formatting is overridden. I've had little success experimenting with \vline, \SetVline and \SetVlines to this end. I'm also wondering what the function of \rline is meant to be?

[lvjr]

The syntax of \rline is similar to that of \cline, but you can not set last vline, since there is no place for it.

\documentclass{article}
\usepackage{tabularray}
\begin{document}
\begin{tblr}{lcr}
\rline{1} Alpha & \rline{1-2} Beta & \rline{2-3} Gamma  \\
        Epsilon &             Zeta &             Eta    \\
           Iota &            Kappa &             Lambda \\
\end{tblr}
\end{document}

[lvjr]

It is in my todo list to allow setting borders with \SetCell, \SetRow, and \SetColumn commands (in their optional arguments).