cell_render_hook => sub {
            
            my ($page,  $row, $col, $is_first_row,  $x, $y, $w, $h) = @_;

            if (( $col == 0) && (!$is_first_row) ) {

            # ...instead of this (which doesn't work)
            # if (( $col == 0) && ($row >= 1) ) {
                                 
                my $t = $row-1;
                ...