private synchronized List<ContextInfo> getContextHistory(String zipPostfix) {
    if (!ENABLED) return Collections.emptyList();
    try (JBZipFile archive = getTasksArchive(zipPostfix)) {
      List<JBZipEntry> entries = archive.getEntries();
      return ContainerUtil.mapNotNull(entries, entry -> entry.getName().startsWith("/context") ? new ContextInfo(entry.getName(), entry.getTime(), entry.getComment()) : null);
    }
    catch (Exception e) {
      LOG.error(e);
      return Collections.emptyList();
    }
  }
private synchronized List<ContextInfo> getContextHistory(String zipPostfix)