public function get_html_class()
{
$html_classes = array();
$object_class = get_class($this);
$html_classes[] = $this->get_type();
$parent_class = $object_class;
while ($parent_class = get_parent_class($parent_class)) {
$clean_class = $this->clean_type($parent_class);
if ($clean_class) {
$html_classes[] = $clean_class;
}
}
return $html_classes;
}