public UsbController(UsbBase usbBase) : base(usbBase) { }
public UsbDevice(UsbBase usbBase) : base(usbBase) { }
public UsbPort(UsbBase usbBase) : base(usbBase) { }
public UsbHub(UsbBase usbBase) : base(usbBase) { }
protected UsbBase(UsbBase parent) { this.Parent = parent; }