private void updateCachedRange(final CommittedChangeList list) {
    if (list.getCommitDate().getTime() > myLastCachedDate.getTime()) {
      myLastCachedDate = list.getCommitDate();
    }
    if (list.getCommitDate().getTime() < myFirstCachedDate.getTime()) {
      myFirstCachedDate = list.getCommitDate();
    }
    if (list.getNumber() < myFirstCachedChangelist) {
      myFirstCachedChangelist = list.getNumber();
    }
    if (list.getNumber() > myLastCachedChangelist) {
      myLastCachedChangelist = list.getNumber();
    }
  }
private void updateCachedRange(final CommittedChangeList list)