code: function (store, json) {
      var handledRecords = [], key, records, handleRecord, Model;
      handleRecord = function (record) {
        this.completeJsonForRecord(store, record, Model, json, handledRecords);
      };
      for (key in json) {
        if (json.hasOwnProperty(key)) {
          records = json[key];
          Model = store.modelFor(singularize(key));
          forEach(records, handleRecord, this);
        }
      }
      return json;
    }
docs: Complete a JSON response to add linked records which are not async
  
  @method completeJsonResponse
  @param {DS.Store} store
  @param {Object} json
  @param {string|DS.Model|Object} [injections...]