Function paho_mqtt_sys::MQTTAsync_send

pub unsafe extern "C" fn MQTTAsync_send(
    handle: MQTTAsync,
    destinationName: *const c_char,
    payloadlen: c_int,
    payload: *const c_void,
    qos: c_int,
    retained: c_int,
    response: *mut MQTTAsync_responseOptions
) -> c_int