protected function setupInheritance()
 {
     parent::setupInheritance();
     $this->widgetSchema['additional'] = new sfWidgetFormFilterInput();
     $this->validatorSchema['additional'] = new sfValidatorPass(array('required' => false));
     $this->widgetSchema->setNameFormat('author_inheritance_concrete_filters[%s]');
 }
 protected function setupInheritance()
 {
     parent::setupInheritance();
     $this->widgetSchema->setNameFormat('author_inheritance_filters[%s]');
 }