StackLayout.vertical {
    $0.vertical {
        $0.add(views: [
            self.label1,
            $0.fixed(h: 100, bgColor: .green),
            self.label2,
            $0.fixed(h: 20, bgColor: .magenta)
        ]).align(horizontal: .fill).distribute(.fill).spacing(20)
    }
    
    $0.horizontal {
        $0.add(views: [$0.flex(), $0.wrap(self.label4, w: 200), $0.flex(), $0.fixed(w: 100, bgColor: .red)])
        $0.align(vertial: .top)
        $0.spacing(10)
        $0.distribute(.fill)
    }
    
    $0.horizontal {
        $0.add(views: [self.label3]).distribute(.fill)
    }
    
    $0.align(horizontal: .fill)
    $0.spacing(30)
}