code: function left() {
          var parentRole = getParentRole();
  
          if (parentRole == "tablist") {
            moveFocus(-1, getFocusElements(focusedElement.parentNode));
          } else if (focusedControl.parent().submenu) {
            cancel();
          } else {
            moveFocus(-1);
          }
        }
docs: Moves the focus to the left this is called by the left key.
  
  @private