public synchronized Pair<List<MailItem>,List<Integer>> getModifiedItems(OperationContext octxt, long lastSync) throws ServiceException {
public synchronized Pair<List<MailItem>,MailItem.TypedIdList> getModifiedItems(OperationContext octxt, long lastSync) throws ServiceException {
    public synchronized Pair<List<MailItem>,List<Integer>> getModifiedItems(OperationContext octxt, long lastSync) throws ServiceException {        return getModifiedItems(octxt, lastSync, MailItem.TYPE_UNKNOWN, null);    }