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Proxy gateways do not run workers, and are meant to be passed with the `via` attribute to additional gateways. They are useful for running multiple workers on remote machines. Example usage: ``` pytest -sv --dist=load --px "id=my_proxy//socket=IP:PORT" --tx "5*popen//via=my_proxy" ``` Proxy gateways do not run workers, anda re meant to be passed