public function processInput($row, $postData)
 {
     $postData = parent::processInput($row, $postData);
     if (!$this->getFilteredCombo()) {
         throw new Kwf_Exception("No filteredCombo set");
     }
     $value = $this->_getValueFromPostData($postData);
     if ($value) {
         $filtered = $this->getFilteredCombo();
         $filtered->setFilterValue($value);
     }
     return $postData;
 }