Source position: libusb.pp line 376
type libusb_iso_sync_type = (
LIBUSB_ISO_SYNC_TYPE_NONE = 0,
LIBUSB_ISO_SYNC_TYPE_ASYNC = 1,
LIBUSB_ISO_SYNC_TYPE_ADAPTIVE = 2,
LIBUSB_ISO_SYNC_TYPE_SYNC = 3
);