Stetho protobufs - Documentation request

I found this issue here: https://github.com/facebook/stetho/issues/250 that suggests that there is a way to log protobuf files. Clearly there has been some work done on this, but it doesn't look like there are any docs or a description on how to use it. So my question - how do we log protobufs with stetho? How do we use this tool you built? @jasta

Thanks!