presto-memory/src/main/java/io/prestosql/plugin/memory/MemorySplit.java/MemorySplit/toString
class MemorySplit:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("tableHandle", table)
                .add("partNumber", partNumber)
                .add("totalPartsPerWorker", totalPartsPerWorker)
                .toString();
    }