ns"><p>Add an item to the menu that when selected adds a checked icon.
</p><h3>Parameters</h3><table class="parameter-list"><tr><td>string label</td><td>The label of the item.</td></tr><tr><td>CommandCallback callback</td><td>The callback to execute when this item is selected in the menu.</td></tr><tr><td>string shortCutText</td><td>The keyboard shortcut text. This is for decoration only, you must also bind this keypress to an event.</td></tr></table><h3>Return Value</h3><p>This widget to aid method chaini