actionName | The path and name of the menu item. Use the path, delimited by forward slashes ('/'), to place the menu item within a submenu. |
actionCallback | The action to execute when the menu item is selected. |
actionStatusCallback | The function called to determine if the menu item is enabled. |
userData | The object to store in the <b>userData</b> property. |
Initializes a menu action with specified parameters.