getContext method
Implementation
@override
Future<ExposureTrackingContext> getContext(String instanceName) async {
String? userId = await _channel
.invokeMethod('getUserId', {'instanceName': instanceName});
String? deviceId = await _channel
.invokeMethod('getDeviceId', {'instanceName': instanceName});
return ExposureTrackingContext(
userId: userId,
deviceId: deviceId,
);
}