super.setSpace(null); deleteMaintainingReferenceToSpace();
deleteWithoutCheckNumberOfSpaceInformations();
    public void delete() {	if (getSpace().getSpaceInformationsCount() == 1) {	    throw new DomainException("space.must.have.at.least.one.space.information");	}	super.setSpace(null);	deleteMaintainingReferenceToSpace();    }