Gateway Device Info
constructor(serialNumber: String, softwareInfo: GatewayDeviceInfo.SoftwareInfo, hardwareInfo: GatewayDeviceInfo.HardwareInfo, runtimeInfo: GatewayDeviceInfo.RuntimeInfo, powerMonitor: GatewayDeviceInfo.PowerMonitor?, ethernet: GatewayDeviceInfo.Ethernet?, modem: GatewayDeviceInfo.Modem?)