code: @NonNull
    public CompletionStage<Void> setKeyspace(@NonNull CqlIdentifier newKeyspace) {
      return poolManager.setKeyspace(newKeyspace);
    }
docs: <b>INTERNAL USE ONLY</b> -- switches the session to a new keyspace.
  
  <p>This is called by the driver when a {@code USE} query is successfully executed through the
  session. Calling it from anywhere else is highly discouraged, as an invalid keyspace would
  wreak havoc (close all connections and make the session unusable).