pub unsafe extern "system" fn libusb_get_config_descriptor_by_value(
dev: *const libusb_device,
bConfigurationValue: u8,
config: *mut *const libusb_config_descriptor
) -> c_int
pub unsafe extern "system" fn libusb_get_config_descriptor_by_value(
dev: *const libusb_device,
bConfigurationValue: u8,
config: *mut *const libusb_config_descriptor
) -> c_int