public function set_fields()
{
$this->add_field(new acf_fields\text('List headline', 'list_headline', '1509052105r'));
$this->add_common_field('demo_background_color', '1509052128y');
$this->add_repeater((new acf_fields\repeater('Items', 'list_items', '1509052105s'))->add_sub_field(new acf_fields\text('Item headline', 'list_item_headline', '1509072209i'))->add_sub_field(new acf_fields\textarea('Item text', 'list_item_text', '1509052124u')));
}