public function validate($model, $exceptions = false, ModelAbstractValidate $validator = null, $removeNotPresentFields = false)
 {
     if (!$validator) {
         if ($model instanceof TariffPlanLifeCycleModel) {
             $validator = new \Application\Model\Validate\TariffPlanLifeCycleValidate();
         } else {
             if ($model instanceof TariffPlanServicesModel) {
                 $validator = new \Application\Model\Validate\TariffPlanServicesValidate();
             } else {
                 return array('Model' => "Data must be a tariff.");
             }
         }
     }
     return parent::validate($model, $exceptions, $validator, $removeNotPresentFields);
 }