public static ClickHouseFile of(String file, ClickHouseCompression compression, int compressionLevel,
            ClickHouseFormat format) {
        return of(new File(ClickHouseChecker.nonEmpty(file, FILE_TYPE_NAME)), compression, compressionLevel, format);
    }
Null file which has no compression and format.
clickhouse-data/src/main/java/com/clickhouse/data/ClickHouseFile.java