presto-orc/src/main/java/io/prestosql/orc/stream/UncompressedOrcChunkLoader.java/UncompressedOrcChunkLoader/toString
class UncompressedOrcChunkLoader:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("loader", dataReader)
                .add("compressedOffset", getCurrentCompressedOffset())
                .toString();
    }