} else if (event instanceof UserInputResumeEvent) {
            handleUserInputResumeEvent((UserInputResumeEvent) event);
            return;
        } else if (event instanceof PromptOutputEvent) {
            handlePromptOutputEvent((PromptOutputEvent) event);
            return;
        } else if (event instanceof UserInputValidationProblemEvent) {
            handleValidationProblemEvent((UserInputValidationProblemEvent) event);
            return;