presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/CassandraSessionProperties.java/CassandraSessionProperties/getSplitsPerNode
class CassandraSessionProperties:    public static Optional<Long> getSplitsPerNode(ConnectorSession session)
    {
        return Optional.ofNullable(session.getProperty(SPLITS_PER_NODE, Long.class));
    }