Optional options: IManifestoOptionsvar label = manifest.getLabel().getValue(); // returns the string for default locale
var label = manifest.getLabel().getValue(locale); // locale a string , examples
// would be "fr", "en-US",
A 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.
returns the PropertyValue which in turn allows a language-specific string encoded in the json as the "label" property