Availability of Google's Refaster templates?

[Refaster's documentation](http://errorprone.info/docs/refaster) is great! Thanks for that.

It mentions the following:

> At Google, we have a tool that uses thousands of these simplification patterns to automatically comment on code reviews, suggesting improvements to code. We hope to release many of these soon.

I am the author of [JnRouvignac/AutoRefactor](https://github.com/JnRouvignac/AutoRefactor)
I am very interested by Refaster as a faster approach to write refactoring rules.
However I do not want to waste time trying to contribute rules that already exist at Google. I think you may not even look at them considering you may already have implemented them.

What are your plans for open sourcing Google's Refaster rules?
Do you have an expected timeframe?