code: function tab(e) {
          var parentRole = getParentRole();
  
          if (parentRole == "tablist") {
            var elm = getFocusElements(focusedControl.getEl('body'))[0];
  
            if (elm) {
              elm.focus();
            }
          } else {
            moveFocus(e.shiftKey ? -1 : 1);
          }
        }
docs: Moves the focus to the next item or previous item depending on shift key.
  
  @private
  @param {DOMEvent} e DOM event object.