Params
Let's soup it up a little by adding matrix or route-specific parameters, so the result URL looks like this: /inbox;a=v1/33;b1=v1;b2=v2:
[
{path: 'inbox', params: {a: 'v1'}},
{path: '33', params: {b1: 'v1', b2: 'v2'}}
]
Matrix parameters are scoped to a particular URL segment. Because of this, there is no risk of name collisions.