gistfile1.txt

Y.PieModel = Y.Base.create('pieModel', Y.Model, [], {

    initializer: function () {
        this.internalModellist = new Y.ModelList();
    },

    _setModelList: function (newdata) {
        return this.internalModellist.reset(newdata);
    }
},
{
  ATTRS: {
    internalModellist: {
      setter: '_setModelList'
    }

  }
}