public function toXMLString()
 {
     $str = '';
     if ($this->DeviceDetails != null) {
         $str .= '<ebl:DeviceDetails>';
         $str .= $this->DeviceDetails->toXMLString();
         $str .= '</ebl:DeviceDetails>';
     }
     return $str;
 }
 public function toXMLString()
 {
     $str = '';
     if ($this->DeviceDetails != null) {
         //prop is not a collection
         //prop is complex
         //prop is not enum
         //does not contain attribute or is attribute
         $str .= '<ebl:DeviceDetails>';
         $str .= $this->DeviceDetails->toXMLString();
         $str .= '</ebl:DeviceDetails>';
     }
     return $str;
 }