final InvocationResult result = InvocationResult.createSuccess();
if (result.isSuccess()) {
if (person.hasInsuranceEventOrAdministrativeOfficeFeeInsuranceEventFor(executionYear)) {
result.addMessage(LabelFormatter.APPLICATION_RESOURCES,
"error.accounting.events.AccountingEventsManager.student.already.has.insurance.event.for.year", person
.getStudent().getNumber().toString(), executionYear.getYear());
result.setSuccess(false);