docs: private List<CmsContainerBean> readModelContainers(
          String modelInstanceId,
          String localInstanceId,
          CmsContainerPageBean modelPage,
          boolean isCopyGroup) {
  
          Map<String, List<CmsContainerBean>> containerByParent = getContainerByParent(modelPage);
          List<CmsContainerBean> modelContainers;
          if (containerByParent.containsKey(modelInstanceId)) {
              modelContainers = collectModelStructure(modelInstanceId, localInstanceId, containerByParent, isCopyGroup);
          } else {
              modelContainers = new ArrayList<CmsContainerBean>();
          }
          return modelContainers;
      }