code: function searchArrayExtension(target, options) {
      target.sortColumn = ko.observable(options.parameters.sortColumn);
      target.subscription = target.sortColumn.subscribe(function (newValue) {
          options.parameters.sortColumn = newValue;
          target.refresh();
      });
      infiniteScroll.scrollableArrayExtension(target, options);
  }
docs: Describes an extension to an observable array that adds a method to load more data
  @param target The observable that is extended
  @param options The options