Ho to dynamically add sub menu items

Can anybody provide an example as to how to create sub menu links dynamically?

I have a route "/rooms" and would like to display a sub menu of the rooms under "rooms" which l obtain via REST with the Rooms Controller and link each sub menu item to "/rooms/info/roomNumber"

- Rooms
-- Room1
-- Room2
-- Room3

I have checked the documentation and found:

baSidebarServiceProvider.addStaticItem({
title: 'Menu Level 1',
icon: 'ion-ios-more'
});

but I'm not sure how to proceed with it.
Thanks!