code: public String getRootFolder() {
  
          String folder = "/";
          if (getSettings().getUserSettings().getRestrictExplorerView()) {
              folder = getSettings().getUserSettings().getStartFolder();
          }
          try {
              getCms().readFolder(folder, CmsResourceFilter.IGNORE_EXPIRATION);
              return folder;
          } catch (CmsException e) {
              // should usually never happen
              if (LOG.isInfoEnabled()) {
                  LOG.info(e);
              }
              return "/";
          }
      }
docs: Determines the root folder of the current tree dependent on users setting of explorer view restriction.<p>
  
  @return the root folder resource name to display