public SensorTagOverview()
        {
            InitializeComponent();
            SensorTagViewModel vm = App.Locator.SensorTagViewModel;

            BindingContext = vm;
        }
        public void TestPropertyChanged()
        {
            Messenger.Reset();

            var  vm = new SensorTagViewModel(null);
            bool propertyChanged = false;

            vm.PropertyChanged += (sender, e) =>
            {
                propertyChanged = true;
            };
            Assert.IsFalse(propertyChanged);

            vm.DeviceList = null;

            Assert.IsTrue(propertyChanged);
        }