public void TestRemove()
        {
            var newItem = new Mock <IStatusBarObjectItem>();

            _statusBarService.AddStatusBarItem(newItem.Object, GridChildLength.Auto);
            Assert.IsTrue(_statusBarService.Children.Contains(newItem.Object));
            _statusBarService.RemoveStatusBarItem(newItem.Object);
            Assert.IsTrue(!_statusBarService.Children.Contains(newItem.Object));
        }