presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/NativeCassandraSession.java/NativeCassandraSession/getProtocolVersion
class NativeCassandraSession:    @Override
    public ProtocolVersion getProtocolVersion()
    {
        return executeWithSession(session -> session.getCluster().getConfiguration().getProtocolOptions().getProtocolVersion());
    }