anchor.diff:  
     // Internal Declaration
     static final AdvancedWayfindingSingleton _bluetoothSingleton =
  -  AdvancedWayfindingSingleton._internal();
  +      AdvancedWayfindingSingleton._internal();
   
     /// Flutter blue instance for scanning
     FlutterBlue flutterBlueInstance = FlutterBlue.instance;
  
positive.code:       try {
          _networkHelper
              .authorizedPost(
              offloadLoggerEndpoint, offloadDataHeader, json.encode(log))
              .then((value) {
          });
        } catch (Exception) {
  
          // Silent login if access token is expired
          if (Exception.toString().contains(ErrorConstants.invalidBearerToken)) {
            userDataProvider.silentLogin();
            offloadDataHeader = {
              'Authorization':
              'Bearer ${userDataProvider?.authenticationModel?.accessToken}'
            };
            _networkHelper.authorizedPost(
                offloadLoggerEndpoint, offloadDataHeader, json.encode(log));
  
negative.code: import 'bluetooth.dart';
  
  class AdvancedWayfindingSingleton extends ChangeNotifier {
    /// Instance variable for starting beacon singleton
    BeaconSingleton beaconSingleton;
  
    /// State for background scanning
    bool inBackground = false;
  
    /// Advertisement string
    String advertisementValue;
  
  