func: static void usb_tablet_class_initfn(ObjectClass *klass, void *data)
  
  {
  
      USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
  
  
  
      uc->init           = usb_tablet_initfn;
  
      uc->product_desc   = "QEMU USB Tablet";
  
      uc->usb_desc       = &desc_tablet;
  
      uc->handle_packet  = usb_generic_handle_packet;
  
      uc->handle_reset   = usb_hid_handle_reset;
  
      uc->handle_control = usb_hid_handle_control;
  
      uc->handle_data    = usb_hid_handle_data;
  
      uc->handle_destroy = usb_hid_handle_destroy;
  
  }
  