Include dependent snap

Is there some way to specify a required snap similar to a reusable part? I’d like to say:

after: [mir-kiosk]
source: https://github.com/MirServer/mir-kiosk

But mir-kiosk is not defined as a reusable part. It is a separate standalone snap. I’d like to have it included / installed automatically whenever I snap install my-snap rather than having to snap install mir-kiosk && snap install my-snap

There’s something called stage-snaps that should replace the usage of remote parts, however it isn’t implemented yet.

Refer: Proposal from a snappy user - `stage-snaps`?