A menu action item.
| eventInfo | Provides information on the event that triggered the drop-down menu. |
| name | The name of the item. The name can be prefixed by its submenu path. Path components are delimited by forward slashes ('/'). |
| status | The status of the item. |
| userData | The userData object stored by the constructor. |
| DropdownMenuAction | コンストラクター |
| Execute | Execute the callback associated with this item. |
| UpdateActionStatus | Update the status flag of this item by calling the item status callback. |
| AlwaysDisabled | Status callback that always returns Status.Disabled. |
| AlwaysEnabled | Status callback that always returns Status.Enabled. |