Extending bundled Typescript definitions for VueRx (or extending in general)

[oliverw]

I'd like to use VueRx in a Typescript project.

VueRx extends the Vue prototype with several methods: https://github.com/vuejs/vue-rx#other-api-methods. Since VueRx does not ship with TS declarations, I would like to roll my own. Unfortunately I'm unable to come up with a way to extend the Vue declarations bundled with VueJs due to the way the declaration is written (classes rather than interfaces). Any suggestions?

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[yyx990803]

/cc @ktsn @HerringtonDarkholme

[HerringtonDarkholme]

Sure, I can add it.