pub unsafe extern "C" fn dc_device_foreach(
device: *mut dc_device_t,
callback: dc_dive_callback_t,
userdata: *mut c_void,
) -> dc_status_t
pub unsafe extern "C" fn dc_device_foreach(
device: *mut dc_device_t,
callback: dc_dive_callback_t,
userdata: *mut c_void,
) -> dc_status_t