if (selectionAttributes.length == 0)
throw new MissingSelectionAttributeException(beanName, rel.getName());
if (selectionAttributes.length > 1)
throw new TooManySelectionAttributesException(beanName, rel.getName());
if (selectionAttributes[0].equals(""))
throw new MissingSelectionAttributeException(beanName, rel.getName());
rel.setRelatedAttributes(Utils.makeShowAttributeVector(rel.getToBeanName(), selectionAttributes, this));