private void updateHistoryIterator() {
    if (!isShown()) {
      return;
    }

    String selectedContributorID = mySearchEverywhereUI.getSelectedTabID();
    if (myHistoryIterator == null || !myHistoryIterator.getContributorID().equals(selectedContributorID)) {
      myHistoryIterator = myHistoryList.getIterator(selectedContributorID);
    }
  }
private void updateHistoryIterator()