code: private Collection<RDFNode> getPropertyValues(Property property, Set<PropertyValuePair> annotationSet) {
          return annotationSet.stream()
                  .filter(p -> p.getProperty().equals(property))
                  .flatMap(p -> p.getValues().stream())
                  .collect(Collectors.toList());
      }
docs: /*
  public Collection<RDFNode> getPropertyValues(Property property) {
  return getPropertyValues(property, this.annotations);
  }