code: public void updateAll(boolean clearFilter) {
  
          try {
              readFolder(m_currentFolder, clearFilter);
              Set<Object> ids = Sets.newHashSet();
              ids.addAll(m_fileTree.getItemIds());
              for (Object id : ids) {
                  updateTree((CmsUUID)id);
              }
          } catch (CmsException e) {
              CmsErrorDialog.showErrorDialog(
                  CmsVaadinUtils.getMessageText(Messages.ERR_EXPLORER_CAN_NOT_READ_RESOURCE_1, m_currentFolder),
                  e);
              LOG.error(e.getLocalizedMessage(), e);
          }
      }
docs: Updates display for all contents of the current folder.<p>
  
  @param clearFilter <code>true</code> to clear the search filter