// The NON-visible 2-flat-hop author: a two-field generic `Box` (size 16) whose
// `tag` returns `self.x + 16`. Same template NAME as b's, different body. It wins
// the global last-wins `fn_ast_map["Box.tag"]`, so a file importing only b.sx
// must NOT dispatch `x.tag()` to it.
Box :: struct($T: Type) {
    x: T;
    y: T;

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

    tag :: (self: *Box) -> T {
        self.x + 16
    }
}