from libusbi.h:728
enum usbi_hotplug_flags
{
USBI_HOTPLUG_DEVICE_ARRIVED = LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED,
USBI_HOTPLUG_DEVICE_LEFT = LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT,
USBI_HOTPLUG_VENDOR_ID_VALID = (1U << 3),
USBI_HOTPLUG_PRODUCT_ID_VALID = (1U << 4),
USBI_HOTPLUG_DEV_CLASS_VALID = (1U << 5),
USBI_HOTPLUG_NEEDS_FREE = (1U << 6),
};