Generator ignores additionalProperties: true

[kotyara85]

Hey there,
I have this openapi spec component:

    Response:
      properties:
        uid:
          type: string
        data:
          type: object
          additionalProperties: true

oapi generator would translate data field into map[string]interface{}

gnostic-grpc can not produce ad working proto, here's the output after I converted to binary pb using gnostic:

message Data {
}

Thanks