getDevice method
Get information for a specific device
@param deviceId @returns {Promise<*|null|{msg: string, error: *}>}
Implementation
Future<EwelinkDevice> getDevice({required String deviceId}) async {
// TODO
// if (this.devicesCache) {
// return this.devicesCache.find(dev => dev.deviceid === deviceId) || null;
// }
return _service.getDevice(
deviceId: deviceId,
);
}