docs: function (modelName, typesUpdated) {
        var _this3 = this;
  
        var klass = this._nameToClass(modelName);
        var records = this.getRecords(klass, modelName);
  
        var onChange = function () {
          typesUpdated([_this3.wrapModelType(klass, modelName)]);
        };
        var observer = {
          didChange: function () {
            _emberMetalRun_loop.default.scheduleOnce('actions', this, onChange);
          },
          willChange: function () {
            return this;
          }
        };
  
        _emberRuntimeMixinsArray.addArrayObserver(records, this, observer);
  
        var release = function () {
          _emberRuntimeMixinsArray.removeArrayObserver(records, _this3, observer);
        };
  
        return release;
      }