* @extends Ext.button.Split
* A specialized SplitButton that contains a menu of {@link Ext.menu.CheckItem} elements. The button automatically
* cycles through each menu item on click, raising the button's {@link #change} event (or calling the button's
* @extends Ext.button.Split
* A specialized SplitButton that contains a menu of {@link Ext.menu.CheckItem} elements. The button automatically
* cycles through each menu item on click, raising the button's {@link #change} event (or calling the button's