protected override void LayoutChildren(double x, double y, double width, double height)
{
foreach (var child in LogicalChildren.Cast <View>())
{
var result = new Rectangle(x, y, 0, 0);
var request = child.GetSizeRequest(double.PositiveInfinity, double.PositiveInfinity);
result.Width = request.Request.Width;
result.Height = request.Request.Height;
child.Layout(result);
}
}