class DefaultWizardRules implements WizardRules {

    @Override
    public boolean canGoPrevious()
    {
        return myStepModel.getCurrentStep() > 0
                && myStepModel.getStepState(myStepModel.getCurrentStep() - 1) != StepState.DISABLED;
    }

    public  DefaultWizardRules(WizardStepListModel stepModel);

}