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It leaves us only with one option:

* get rid of the deprecated Beta APIs (PR sent, thanks Cody!)

* upgrade to 16.x

We could:

* get rid of APIs as we upgrade to newer Java

* get rid of APIs we do use sparely and for no reason (e.g. just once or twice) (e.g. MapMaker)

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Some of other APIs we use and are still @Beta in 16:

2x ByteStreams (@Beta, but Since Guava 1.0)

1x Files (@Beta, but Since Guava 1.0)

4x LoadingCache (@Beta, Since Guava 11.0)

The last one is the only which is potentially fragile (we already had to refactor it once):

https://github.com/richfaces/richfaces/commit/9f26b20e1850548f683fd406146216e25c0ab4e1