internal static void VerifyContainerViewRect(LayoutManager layoutManager, int blockViewIndex, Rect expectedRect)
        {
            var blockView = blockViewIndex == -1 ? layoutManager.CurrentContainerView : layoutManager.ContainerViewList[blockViewIndex];
            var rect      = layoutManager.GetRect(blockView);

            Assert.AreEqual(expectedRect, rect);
        }
        private static void VerifyRowBindingRect(LayoutManager layoutManager, RowView rowView, int rowBindingIndex, Rect expectedRect)
        {
            var rowBindings = rowView.RowBindings;
            var rect        = layoutManager.GetRect(rowView, rowBindings[rowBindingIndex]);

            Assert.AreEqual(expectedRect, rect);
        }