docs: function (cfg, ctxt) {
          this.$Container.constructor.apply(this, arguments);
          if (!this._frame) {
              /* this._frame could be overriden in sub-classes */
              this._frame = ariaWidgetsFramesFrameFactory.createFrame({
                  skinnableClass : this._skinnableClass,
                  sclass : cfg.sclass,
                  state : "normal",
                  width : cfg.width,
                  height : cfg.height,
                  printOptions : cfg.printOptions
              });
          }
      }