/**
*
*/
public function set_fields()
{
$fc = new acf_fields\flexible_content('Modules', 'modules', '1509111554i');
$l = new layout('', 'l1', '1509111555a');
$l->add_brick(new demo_video('video', '1509111556x'));
$fc->add_layout($l);
$l = new layout('', 'l2', '1509111557u');
$l->add_brick(new demo_button('button', '1509111556s'));
$fc->add_layout($l);
$this->add_flexible_content($fc);
}