public function toXMLString() { $str = ''; $str .= '<ns:GetIncentiveEvaluationReq>'; if ($this->GetIncentiveEvaluationRequest != null) { $str .= '<ns:GetIncentiveEvaluationRequest>'; $str .= $this->GetIncentiveEvaluationRequest->toXMLString(); $str .= '</ns:GetIncentiveEvaluationRequest>'; } $str .= '</ns:GetIncentiveEvaluationReq>'; return $str; }