// The NON-visible 2-flat-hop author: a two-field generic `Box` (size 16) with a
// BY-VALUE receiver `dbl` (`self: Box`) returning `self.x * 2 + 100`. Its
// by-value receiver ABI (`{i64,i64}`) differs from b's (`{i64}`); it wins the
// global last-wins `fn_ast_map["Box.dbl"]`, so a file importing only b.sx must
// NOT dispatch `x.dbl()` to it.
Box :: struct($T: Type) {
    x: T;
    y: T;

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

    dbl :: (self: Box) -> T {
        self.x * 2 + 100
    }
}