code: public List<String> getModulesToUpdate() {
  
          if (m_modulesToUpdate == null) {
              getUptodateModules();
              m_components = new CmsIdentifiableObjectContainer<CmsSetupComponent>(true, true);
              try {
                  addComponentsFromPath(m_webAppRfsPath + FOLDER_UPDATE);
              } catch (CmsConfigurationException e) {
                  //
              }
          }
          return m_modulesToUpdate;
      }
docs: List of modules to be updated.<p>
  
  @return a list of module names