Function librdkafka_sys::rd_kafka_conf_set_open_cb

pub unsafe extern "C" fn rd_kafka_conf_set_open_cb(
    conf: *mut rd_kafka_conf_t, 
    open_cb: Option<unsafe extern "C" fn(_: *const c_char, _: c_int, _: mode_t, _: *mut c_void) -> c_int>
)