@Nullable
  public ModuleWizardStep getNextStep(ModuleWizardStep step) {
    final List<ModuleWizardStep> steps = getSelectedSteps();
    final int i = steps.indexOf(step);
    return i < steps.size() - 1 ? steps.get(i + 1) : null;
  }
@Nullable
  public ModuleWizardStep getNextStep(ModuleWizardStep step)