docs: protected static List<CmsContainerElementBean> loadGroupContainerElements(CmsObject cms, CmsResource resource)
      throws CmsException {
  
          CmsXmlGroupContainer xmlGroupContainer = CmsXmlGroupContainerFactory.unmarshal(cms, resource);
          CmsGroupContainerBean groupContainer = xmlGroupContainer.getGroupContainer(cms);
          List<CmsContainerElementBean> elemBeans = groupContainer.getElements();
          List<CmsContainerElementBean> result = new ArrayList<CmsContainerElementBean>();
          for (CmsContainerElementBean elementBean : elemBeans) {
              if (!elementBean.isInMemoryOnly()) {
                  elementBean.initResource(cms);
                  result.add(elementBean);
              }
          }
          return result;
      }