if (!isMedicalSituation(serviceExemption)
if (!serviceExemption.isMedicalSituation()
    public List<TeacherServiceExemption> getServiceExemptionSituations(Date beginDate, Date endDate) {        List<TeacherServiceExemption> serviceExemptions = new ArrayList<TeacherServiceExemption>();        for (TeacherServiceExemption serviceExemption : this.getServiceExemptionSituations()) {            if (!isMedicalSituation(serviceExemption)                    && serviceExemption.belongsToPeriod(beginDate, endDate)) {                serviceExemptions.add(serviceExemption);            }        }        return serviceExemptions;    }