namespace System.Windows.Controls
{
    public struct HierarchicalVirtualizationItemDesiredSizes
    {
        public HierarchicalVirtualizationItemDesiredSizes(Size logicalSize, Size logicalSizeInViewport, Size logicalSizeBeforeViewport, Size logicalSizeAfterViewport, Size pixelSize, Size pixelSizeInViewport, Size pixelSizeBeforeViewport, Size pixelSizeAfterViewport);
    }
}