/** {@inheritDoc} */
 public function beforeSave()
 {
     $fieldName = $this->getProperty('field_name', null);
     $fieldValue = $this->getProperty('field_value', null);
     if (!is_null($fieldName) && !is_null($fieldValue)) {
         $array = $this->object->toArray();
         if (isset($array[$fieldName])) {
             $this->object->fromArray(array($fieldName => $fieldValue));
         }
     }
     return parent::beforeSave();
 }
 /** @inheritdoc} */
 public function getProfit(MlmSystemProfit $instance)
 {
     $profit = $instance->get('profit');
     return $profit;
 }