presto-hive/src/main/java/io/prestosql/plugin/hive/HiveSplit.java/HiveSplit/toString
class HiveSplit:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .addValue(path)
                .addValue(start)
                .addValue(length)
                .addValue(fileSize)
                .toString();
    }