Function librdkafka_sys::rd_kafka_topic_conf_set_partitioner_cb

pub unsafe extern fn rd_kafka_topic_conf_set_partitioner_cb(topic_conf: *mut rd_kafka_topic_conf_t,
                                                            partitioner: Option<unsafe extern fn(rkt: *const rd_kafka_topic_t, keydata: *const c_void, keylen: size_t, partition_cnt: int32_t, rkt_opaque: *mut c_void, msg_opaque: *mut c_void) -> int32_t>)