Fixture: fonds-with-children

Source: https://heratio.theahg.co.za/api/ric/v1/records/kc4x-45tz-em84

A RecordSet with descendants. Exercises: rico:RecordSet class, rico:identifier, rico:title, and the way Heratio folds child references into the response.

Validation: expected.jsonld MUST validate against the schema selected by its @type.