select method
Implementation
void select(Event event, MenuItem item, MenuItemGroup group) {
//item.action?.call();
item.actionWithContext?.call(event);
// Fire the event for activating the menu item. This does not mean the item
// is selected, but merely that it was triggered (by mouse, keyboard, w/e).
_selected.add(item);
// If the item is in a multi-select group, keep the menu open so the user
// can select multiple items.
if (group is! MenuItemGroupWithSelection ||
group.shouldCloseMenuOnSelection) {
_menuRoot.closeHierarchy();
}
}