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View Hierarchy

sv(
    subview1,
    subview2,
    subview3
)

sv([]) and sv() are essentially shortcuts that call addSubview() and view.translatesAutoresizingMaskIntoConstraints = false

It also has the benefit of being very visual so that your can actually see what the view hierarchy is. This is especially true for nested hierarchies :

sv(
    subview1,
    subview2.sv(
        nestedView1,
        nestedView2̨
    ),
    subview3
)