// Author B's generic `Box` — two s64 fields (size 16). Same template NAME as
// A's, different layout AND different `make` (sets `y = value + 100`). The
// qualified static head must select by namespace author for both.
Box :: struct($T: Type) {
    x: T;
    y: T;

    make :: (value: T) -> Box(T) {
        .{ x = value, y = value + 100 }
    }
}