private void markDeletedSystemUnshelved() {
    List<ShelvedChangeList> systemUnshelved =
      ContainerUtil.filter(schemeManager.getAllSchemes(), list -> (list.isRecycled()) && list.isMarkedToDelete());
    for (ShelvedChangeList list : systemUnshelved) {
      list.setDeleted(true);
      list.markToDelete(false);
    }
  }
private void markDeletedSystemUnshelved()