value struct movement:
    x: i32

func (m movement) move(amount: i32):
    m.x += amount

struct combat:
    health: i32

func (c combat) hit(amount: i32):
    c.health -= amount

struct player:
    using motion: movement
    using combat

value struct kit:
    using movement
    using combat

func entry(value: i32) -> i32:
    var shared = combat(health = 100)
    var p = player(motion = movement(x = value), combat = shared)
    p.move(2)
    p.motion.move(3)
    p.hit(4)
    var a = kit(movement = movement(x = 1), combat = shared)
    var b = a
    b.move(2)
    b.hit(4)
    return p.x + a.x + b.x + a.health