define (['app'], function (){

  webix.ui.datafilter.selectFilter.originalRefresh = webix.ui.datafilter.selectFilter.refresh;
  webix.ui.datafilter.selectFilter.refresh = function (master, node, value) {
    this.originalRefresh.apply(this, arguments);
    var node = this.getInputNode(node);
      if (node && node.options) node.options[0].text = value.$emptyString || '';
    };

  return window.$emptyString;
});