docs: public CmsFolder readFolder(CmsRequestContext context, String resourcename, CmsResourceFilter filter)
      throws CmsException {
  
          CmsFolder result = null;
          CmsDbContext dbc = m_dbContextFactory.getDbContext(context);
          try {
              result = readFolder(dbc, resourcename, filter);
          } catch (Exception e) {
              dbc.report(null, Messages.get().container(Messages.ERR_READ_FOLDER_2, resourcename, filter), e);
          } finally {
              dbc.clear();
          }
          return result;
      }