pub unsafe extern "C" fn dc_device_set_events(
device: *mut dc_device_t,
events: c_uint,
callback: dc_event_callback_t,
userdata: *mut c_void,
) -> dc_status_tpub unsafe extern "C" fn dc_device_set_events(
device: *mut dc_device_t,
events: c_uint,
callback: dc_event_callback_t,
userdata: *mut c_void,
) -> dc_status_t