private JqlOperand findOperandOfPredicate(JqlHistoryPredicate.Type type) {
    for (JqlHistoryPredicate predicate : getHistoryPredicates()) {
      if (predicate.getType() == type) {
        return predicate.getOperand();
      }
    }
    return null;
  }
private JqlOperand findOperandOfPredicate(JqlHistoryPredicate.Type type)