code: function (index, count) {
      var newItems = Array.prototype.slice.call(arguments, 2),
      oldItems     = this.source.splice.apply(this.source, arguments);
  
      this._updateInfo();
  
      // DEPRECATED
      this.emit("replace", newItems, oldItems, index);
      this.emit("update", { insert: newItems, remove: oldItems });
    }
docs: Removes N Number of items
  @method splice
  @param {Number} index start index
  @param {Number} count number of items to remove