IPersistentExportGrouping persistentExportGrouping = sp.getIPersistentExportGrouping();
    public Boolean run(Integer executionCourseId, Integer groupPropertiesId)            throws FenixServiceException, ExcepcaoPersistencia {        if (groupPropertiesId == null) {            return Boolean.FALSE;        }        ISuportePersistente sp = PersistenceSupportFactory.getDefaultPersistenceSupport();        IPersistentGrouping persistentGrouping = sp.getIPersistentGrouping();        IPersistentExportGrouping persistentExportGrouping = sp.getIPersistentExportGrouping();        IGrouping groupProperties = (IGrouping) persistentGrouping.readByOID(Grouping.class,                groupPropertiesId);        if (groupProperties == null) {            throw new ExistingServiceException();        }        groupProperties.delete();                persistentGrouping.deleteByOID(Grouping.class, groupPropertiesId);        return Boolean.TRUE;    }