A | B | C

##</code><code>##

NavBar(' | ', ['TASK_A', 'TASK_B', 'TASK_C']);

##</code><code>##

sub render {
    my($self, $source, $buffer) = @_;
    my($sep) = $self->render_attribute('separator'. $source);
    my($need_sep) = 0;
    foreach my $w (@{$self->get('values')}) {
        my($b);
        $self->unsafe_render_value($w, $source, \$b);
        $$buffer .= ($need_sep++ ? $sep : '') . $$b
            if $$b;
    }
    return;
}