Function librdkafka_sys::rd_kafka_consume_callback_queue

pub unsafe extern fn rd_kafka_consume_callback_queue(rkqu: *mut rd_kafka_queue_t,
                                                     timeout_ms: c_int,
                                                     consume_cb: Option<unsafe extern fn(rkmessage: *mut rd_kafka_message_t, opaque: *mut c_void)>,
                                                     opaque: *mut c_void)
                                                     -> c_int