The class to use for the submenu icon.
Menu entries are sorted in ascending order based on their order strings. If omitted the determined
label will be used instead.
How the node and its children should be rendered. See CompoundMenuNodeRole.
Condition under which the menu node should be rendered. See https://code.visualstudio.com/docs/getstarted/keybindings#_when-clause-contexts
Additional options when creating a new submenu.