@Override
    public MessageBusVisitorSession createVisitorSession(VisitorParameters params) throws ParseException, IllegalArgumentException {
        MessageBusVisitorSession session = MessageBusVisitorSession.createForMessageBus(
                messageBus(), scheduledExecutorService, params);
        session.start();
        return session;
    }
Creates a new document access using the supplied parameters.

@param params All parameters for construction.
documentapi/src/main/java/com/yahoo/documentapi/messagebus/MessageBusDocumentAccess.java