pub unsafe extern "C" fn rd_kafka_consume_callback(
    rkt: *mut rd_kafka_topic_t,
    partition: i32,
    timeout_ms: c_int,
    consume_cb: Option<unsafe extern "C" fn(rkmessage: *mut rd_kafka_message_t, commit_opaque: *mut c_void)>,
    commit_opaque: *mut c_void
) -> c_int