`menu()` creates a window menu. `menu_item()` creates menu items or submenu nodes.
Creates a menu container.
Creates a menu item or submenu node.
| Method | Returns | Description |
|---|---|---|
| `add(menuItem)` | self | Adds a `menu_item()` to the menu. |
| Method | Returns | Description |
|---|---|---|
| `add(item)` | self | Adds an existing `menu_item()` as a child. |
| `add(text, callback)` | self | Adds a selectable child item with callback. |