code: function (charCode, keyCode, currentText, caretPosStart, caretPosEnd) {
              var report = new ariaWidgetsControllersReportsDropDownControllerReport();
              report.ok = true;
              report.cancelKeyStroke = false;
              report.displayDropDown = this._dataModel.listContent.length > 0;
              return report;
          }
docs: Check for the case when the displayedValue will change This has to be overridden to handle list update on key
  stroke
  @param {Integer} charCode
  @param {Integer} keyCode
  @param {String} currentText
  @param {Integer} caretPos
  @return {aria.widgets.controllers.reports.ControllerReport}