Optional
options: IManifestoOptionsA function that wraps the getProperty function, which client code can use if it is needed to identify when the json value of a property is an IRI -- Internationalized Resource Identifier
If the value of the json value is a bare string, then it will be wrapped in a json object with the string in the property 'id', additionally that property will have a property 'isIRI' which will be true for the literal string case, otherwise false meaning the returned getProperty should be parsed as before.
Developer note: This implementation does not strictly adhere to the description of SpecificResource in the Web Annotation Model document https://www.w3.org/TR/annotation-model/ section 4 : https://www.w3.org/TR/annotation-model/#specific-resources
The getTransform() method returning an Array of 3D Transfom resources, is an extension of SpecificResource beyond the web annotation model.