@Override
    public Result get(DocumentId id) {
        return get(id, parameters());
    }
Creates a new async session running on message bus logic with a specified reply handler.

@param asyncParams common asyncsession parameters, not used
@param bus         the message bus on which to run
@param mbusParams  parameters concerning message bus configuration
@param handler     the external reply handler
documentapi/src/main/java/com/yahoo/documentapi/messagebus/MessageBusAsyncSession.java