Ceci n'est pas un HyParView.
This is not a HyParView protocol implementation. Expart is simply a wrapper to partisan.
Well, Partisan is much more flexible and supports more protocols. But Partisan's configuration is quite verbose. It also requires you to create a GenServer module to pass as callback for received messages. Sometimes it's pretty useful to simply specify a function as a callback instead of writing a specific module.
Expart wraps that logic away and gives you access to the actual communication API in a more Elixir friendly manner.
If you need something more complete, I highly recommend partisan. Otherwise you can take a look at the examples.
Expart is a work in progress™. It still doesn't fully support the complete Partisan API. More to come.