presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/RaptorSplit.java/RaptorSplit/toString
class RaptorSplit:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("shardUuids", shardUuids)
                .add("bucketNumber", bucketNumber.isPresent() ? bucketNumber.getAsInt() : null)
                .add("hosts", addresses)
                .omitNullValues()
                .toString();
    }