code: public void addPage(WizardPage<DATA> page) {
  		if (!started) {
  			WizardPage<DATA> lastPage = pages.size() > 0 ? pages.get(pages.size() - 1) : null;
  			if (lastPage != null) {
  				lastPage.setNextPage(page);
  				page.setPreviousPage(lastPage);
  			}
  			pages.add(page);
  			wizardView.addPageToView(page);
  		}
  	}
docs: Adds a page to this wizard. The page order is determined by the order in which pages are added.
  
  @param page
  the page to be added