public void TestMultiRowLayoutMeasure()
        {
            var layout = new FlowLayout();

            layout.Padding = 10;
            layout.Spacing = new Xamarin.Forms.Thickness(5);
            layout.Children.Add(new BoxView {
                WidthRequest = 90, HeightRequest = 30
            });
            layout.Children.Add(new BoxView {
                WidthRequest = 30, HeightRequest = 30
            });

            var sizeRequest = layout.Measure(100, double.PositiveInfinity);

            Assert.AreEqual(100, sizeRequest.Request.Width);
            Assert.AreEqual(90, sizeRequest.Request.Height);
        }