pub unsafe extern "C" fn MQTTAsync_setConnectionLostCallback(
handle: MQTTAsync,
context: *mut c_void,
cl: MQTTAsync_connectionLost
) -> c_int
pub unsafe extern "C" fn MQTTAsync_setConnectionLostCallback(
handle: MQTTAsync,
context: *mut c_void,
cl: MQTTAsync_connectionLost
) -> c_int