public WaitState(FastSaleUnit u) { unit = u; }
public LeaveState(FastSaleUnit u) { unit = u; }
public ComeState(FastSaleUnit u) { unit = u; }
public WaitState(FastSaleUnit u) { unit = u; }
public LeaveState(FastSaleUnit u) { unit = u; }
public ComeState(FastSaleUnit u) { unit = u; }