protected function set_properties()
 {
     parent::set_properties();
     $this->get_category()->set_color($this->form->get_value('color'));
 }
 protected function set_properties()
 {
     parent::set_properties();
     $this->get_category()->set_description($this->form->get_value('description'));
     $this->get_category()->set_image(new Url($this->form->get_value('image')));
 }
 protected function set_properties()
 {
     parent::set_properties();
     $this->get_category()->set_description($this->form->get_value('description'));
     if ($this->get_category()->get_type() == ForumCategory::TYPE_URL) {
     }
     $this->get_category()->set_url($this->form->get_value('url'));
 }