presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/CassandraClusteringPredicatesExtractor.java/CassandraClusteringPredicatesExtractor/ClusteringPushDownResult
class CassandraClusteringPredicatesExtractor:        public ClusteringPushDownResult(Map<ColumnHandle, Domain> domains, String domainQuery)
        {
            this.domains = requireNonNull(ImmutableMap.copyOf(domains));
            this.domainQuery = requireNonNull(domainQuery);
        }