public Builder replica(Integer num) {
            if (num != null) {
                options.put(PARAM_REPLICA_NUM, num.toString());
            } else {
                options.remove(PARAM_REPLICA_NUM);
            }
            return this;
        }
Sets all tags for this node. Use null or empty value to clear all existing
tags.

@param tags list of tags for the node, null tag will be ignored
@return this builder
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseNode.java