code: private List<CmsContainerElementBean> getGroupContainerElements(CmsResource resource) throws CmsException {
  
          CmsXmlGroupContainer xmlGroupContainer = CmsXmlGroupContainerFactory.unmarshal(
              getCmsObject(),
              resource,
              getRequest());
          CmsGroupContainerBean groupContainer = xmlGroupContainer.getGroupContainer(getCmsObject());
          return groupContainer.getElements();
      }
docs: Returns the sub-elements of this group container resource.<p>
  
  @param resource the group container resource
  
  @return the sub-elements
  
  @throws CmsException if something goes wrong reading the resource