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