Function librdkafka_sys::rd_kafka_conf_set_log_cb

pub unsafe extern "C" fn rd_kafka_conf_set_log_cb(
    conf: *mut rd_kafka_conf_t, 
    log_cb: Option<unsafe extern "C" fn(_: *const rd_kafka_t, _: c_int, _: *const c_char, _: *const c_char)>
)