init method
Starts gathering information about this router. This method does not have to be called if the device was found via Router.find() or Router.findAll()
Implementation
Future init() async {
_wanExternalService =
await device!.getService('urn:upnp-org:serviceId:WANIPConn1');
_wanCommonService =
await device!.getService('urn:upnp-org:serviceId:WANCommonIFC1');
_wanEthernetLinkService =
await device!.getService('urn:upnp-org:serviceId:WANEthLinkC1');
}