## create an HTML::TreeBuilder obj from the content
    my $tree = $self->gen_tree( $mech->content() );

    ## see if there are exactly 10 camel_id checkboxes
    $self->check_for_input( $tree, sub {
        my ($widget) = @_;
        if (lc( $widget->attr('type') ) eq 'checkbox'
            and $widget->attr('name') eq 'camel_id') {
            return 1;
        }
        return;
    }, 'Camel checkboxes', 10);