Deserialize How get attributes of relationsship

[rustam87]

i have

"included": [
        {
            "type": "author",
            "id": "321321",
            "attributes": {
                "surname": "Nick",
                "name": "Joesn"
            },

new JSONAPIDeserializer({
  author: {
    valueForRelationship: function (relationship) {
      return {
        id: relationship.id,
     // There i have only id = 321321
    // How get  "surname" and  "name"
      };
    }
  }
})

[rustam87]

i found

valueForRelationship: function (relationship, included) {
return {
id: relationship.id,
name: included.name
};
}

please, add it to doc, because it very important