code: function getProductsStream (types) {
    var stream = JSONStream.stringify(false);
    this.getProductsLists().then(function (lists) {
      this.getProductsDetails(selectProducts(types, lists), true)
          .pipe(JSONStream.parse())
          .pipe(stream);
    }.bind(this));
    return stream;
  }
docs: [getProductsStream description]
  
  @param  {[type]} types [description]
  @return {[type]}       [description]