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