public static List<string> getGuidanceItemsHtml(this TM_Xml_Database tmDatabase, Guid sessionId, List<Guid> guidanceItemsIds) { UserRole.ReadArticles.demand(); var data = new List<string>(); if (guidanceItemsIds.notNull()) foreach (var guidanceItemId in guidanceItemsIds) { data.add(tmDatabase.getGuidanceItemHtml(sessionId, guidanceItemId)); } return data; }