presto-hive/src/main/java/io/prestosql/plugin/hive/parquet/ParquetReaderConfig.java/ParquetReaderConfig/setMaxMergeDistance
class ParquetReaderConfig:    @Config("parquet.max-merge-distance")
    public ParquetReaderConfig setMaxMergeDistance(DataSize distance)
    {
        options = options.withMaxMergeDistance(distance);
        return this;
    }