code: public Cassandra.Client getCassandra() {
      if ( !isOpen() ) {
        throw new IllegalStateException("getCassandra called on client that was not open. You should not have gotten here.");
      }
      if ( cassandraClient == null ) {
        cassandraClient = new Cassandra.Client(new TBinaryProtocol(transport));
      }
      return cassandraClient;
    }
docs: {@inheritDoc}