Any tips on capacity-testing BEAM / gen_server apps using Tsung?

I have recently started using Tsung to do capacity tests for BEAM apps using HTTP and Websockets.

Right now, I want to use it to test an Erlang app that only uses BEAM / gen_server messaging.
Tsung has a plugin that allows to use such communication: ts_erlang.
However, I’m having trouble finding any examples or description for properly setting up the Tsung xml script for using that module.

Has anyone here had experience using the ts_erlang Tsung module to test an Erlang app using native BEAM messages? If so, any examples or guidelines for setting up the Tsung xml script for it would be greatly appreciated!
Thank you.

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