List<String> categories = configuration.getStringList(WPCConfigurationStringList.ISBN_ERRORS_CATEGORIES);
if (categories != null) {
for (String category : categories) {
String categoryTitle = wikiConfiguration.getPageTitle(Namespace.CATEGORY, category);
Page categoryPage = DataManager.getPage(wiki, categoryTitle, null, null, null);
api.retrieveCategoryMembers(wiki, categoryPage, 0, false);
List<Page> categoryMembers = categoryPage.getRelatedPages(
Page.RelatedPages.CATEGORY_MEMBERS);
if (categoryMembers != null) {
warningPages.addAll(categoryMembers);
}