/p><p>There can only be one group of radio button entries in one menu. If more
 than one group is needed use cascading menus to hold each group.

</p><h3>Parameters</h3><table class="parameter-list"><tr><td>Image image</td><td>The image of the entry.</td></tr><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 fo