public function __construct(View_Manager $view_manager)
 {
     parent::__construct($view_manager);
     $this->_session_var = 'testform';
     $this->template = 'testform/default';
     // default template
 }
 protected function _restoreSubmitValues()
 {
     parent::_restoreSubmitValues();
     $hidden = $this->_index->hidden;
     if ($this->hidden !== null && !empty($hidden)) {
         $hidden[0]->vo->value = $hidden[0]->value;
     }
 }