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); }