Composing componentless and empty-path routes

What is really exciting about all these features is that they compose very nicely. So we can use them together to handle advanced use cases in just a few lines of code.

Let me give you an example. We have learned that we can use empty-path routes to instantiate components without consuming any URL segments, and we can use componentless routes to consume URL segments without instantiating components. What about combining them?

[
  {
    path: '',
    canActivate: [CanActivateMessagesAndContacts],
    resolve: {
      token: TokenNeededForBothMessagsAndContacts
    },

    children: [
      {
        path: 'messages',
        component: MesssagesCmp
      },
      {
        path: 'contacts',
        component: ContactsCmp
      }
    ]
  }
]

Here we have defined a route that neither consumes any URL segments nor creates any components, but used merely...