public static ClickHouseNodeSelector of(String tag, String... more) {
        List<String> list = new LinkedList<>();

        if (!ClickHouseChecker.isNullOrEmpty(tag)) {
            list.add(tag);
        }

        if (more != null) {
            for (String t : more) {
                if (!ClickHouseChecker.isNullOrEmpty(t)) {
                    list.add(t);
                }
            }
        }

        return of(null, list);
    }
Creates a node selector by specifying preferred tags.

@param tag  preferred tag
@param more more tags
@return non-null selector
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseNodeSelector.java