HealthInsurance example did not match provided Schema and sources

[pcvolkmer]

Patient property healthInsurance in sample data contains:

(https://dnpm-dip.net/api/mtb/fake/data/patient-record?format=application/json%2Bv2)

...
"healthInsurance": {
  "extId": {
    "value": "aok-ik",
    "system": "IK"
  },
  "display": "AOK",
  "type": "Organization"
}
...

but code shows a reference, not object:

dnpm-dip-core/src/main/scala/de/dnpm/dip/model/Patient.scala

Line 23 in a067fb3

healthInsurance: Option[Reference[Organization]],

The code matches provided schema file:
(https://dnpm-dip.net/api/mtb/etl/patient-record/schema?format=application/json%2Bv2)

...
"healthInsurance" : {
  "$ref" : "#Reference"
}
...

Reference is defined in schema as (without extId):

"Reference": {
  "$anchor": "Reference",
  "properties": {
    "id": {
      "type": "string"
    },
    "display": {
      "type": "string"
    },
    "type": {
      "type": "string"
    }
  },
  "additionalProperties": false,
  "type": "object",
  "required": [
    "id"
  ]
}

and in code (containing extId):

dnpm-dip-core/src/main/scala/de/dnpm/dip/model/Reference.scala

Lines 15 to 21 in a067fb3

	final case class Reference[+T]
	(
	id: Option[Id[T]],
	extId: Option[ExternalId[T]],
	uri: Option[URI],
	display: Option[String]
	)

Is the sample data out of date or anything else missing?