presto-spi/src/main/java/io/prestosql/spi/block/DictionaryId.java/DictionaryId/randomDictionaryId
class DictionaryId:    public static DictionaryId randomDictionaryId()
    {
        return new DictionaryId(nodeId.getMostSignificantBits(), nodeId.getLeastSignificantBits(), sequenceGenerator.getAndIncrement());
    }