$self->message($level, $prefix . sprintf($format, @sorted_names));
$self->message($level, $prefix . join('+', map { '-' x $column_lengths{$_} } @sorted_names));
$self->message($level, $prefix . sprintf($format, @sorted_names));
$self->message($level, $prefix . join('+', map { '-' x $column_lengths{$_} } @sorted_names));