Adds an item with a submenu. The submenu is the name of a child PopupMenu node that would be shown when the item is clicked. An id can optionally be provided, but if is isn't provided, one will be created from the index.
See Implementation
Adds an item with a submenu. The submenu is the name of a child PopupMenu node that would be shown when the item is clicked. An id can optionally be provided, but if is isn't provided, one will be created from the index.