return false;
throw new DomainException("error.execution.course.cant.delete");
	private boolean canBeDeleted() {		if (hasAnyAssociatedSummaries()) {			return false;		}		if (!getGroupings().isEmpty()) {			return false;		}		if (hasAnyAssociatedBibliographicReferences()) {			return false;		}		if (hasAnyAssociatedEvaluations()) {			return false;		}		if (hasEvaluationMethod()) {			return false;		}		if (hasAnyAssociatedShifts()) {			return false;		}		if (hasCourseReport()) {			return false;		}		final Site site = getSite();		if (site != null) {			if (site.hasAnyAssociatedAnnouncements()) {				return false;			}			if (site.hasAnyAssociatedSections()) {				return false;			}		}		for (final Professorship professorship : getProfessorships()) {			if (professorship.hasAnyAssociatedShiftProfessorship()) {				return false;			}			if (professorship.hasAnyAssociatedSummaries()) {				return false;			}			if (professorship.hasAnySupportLessons()) {				return false;			}		}		return true;	}