public function get(Theme $theme)
{
$this->properties['type'] = 'hidden';
$this->properties['data-facet-config'] = json_encode($this->properties['data-facet-config']);
$this->set_template_properties('div', array('id' => $this->get_visualizer(), 'data-target' => $this->get_id()));
return parent::get($theme);
}