// a.sx is the first-wins winner for both names. `combine` is FIXED arity;
// `pick` is VARIADIC. `from_a_*` call them bare — a authors the winner, so
// they resolve through the existing path and pack against a's own shapes.
combine :: (x: s64, y: s64) -> s64 { return x + y; }
pick :: (..xs: []s64) -> s64 {
    result := 0;
    for xs (it) { result = result + it; }
    result
}
from_a_combine :: () -> s64 { return combine(10, 20); }
from_a_pick :: () -> s64 { return pick(1, 2, 3); }