docs: @Override
  	public LinkRelation getCollectionResourceRelFor(Class<?> type) {
  
  		Relation annotation = lookupAnnotation(type);
  
  		if (annotation == null || Relation.NO_RELATION.equals(annotation.collectionRelation())) {
  			throw new IllegalArgumentException(String.format("No collection relation found for type %s!", type.getName()));
  		}
  
  		return LinkRelation.of(annotation.collectionRelation());
  	}