docs: function (propertyName, newValue, oldValue) {
              var dom = this.getDom();
              if (propertyName == 'text' && newValue !== null) {
                  if (this._activateEllipsis) {
                      dom.innerHTML = "";
                      this.__ellipseText(newValue);
                  } else {
                      // String cast
                      newValue = '' + newValue;
                      dom.getElementsByTagName("span")[0].innerHTML = ariaUtilsString.escapeHTML(newValue);
                      this.textContent = newValue;
                  }
              }
          }