// This is the Soldier API
class Soldier {
  equipShootingGun(shootingGun) {
    this.shootingGun = shootingGun;
  }
  equipWhiteGun(whiteGun) {
    this.whiteGun = whiteGun;
  }
  stab(target) {
    // This doesn't look quite right
    shootingWeapon.shoot(target);
  }
}

// ...

// This is the Soldier client
const mary = new Soldier();
mary.equipShootingGun(new handGun());
mary.equipWhiteGun(new Knife());
mary.stab(new Soldier()); // Shootin... wait!