public UnionController(RandData rand)
 {
     this.rand  = rand;
     carHandle  = new CarController(rand);
     custHandle = new CustController(rand);
     sellHandle = new SellController(rand);
 }
 public UnionController(
     CarController carHandle,
     CustController custHandle,
     SellController sellHandle)
 {
     this.carHandle  = carHandle;
     this.custHandle = custHandle;
     this.sellHandle = sellHandle;
 }