public function getApiParamValidation($child_param_validation = null)
 {
     if ($child_param_validation != null) {
         $params_validation = $child_param_validation + $this->api_params_validation__method;
     } else {
         $params_validation = $this->api_params_validation__method;
     }
     return parent::getApiParamValidation($params_validation);
 }