how to start proxy for selenium in new version??

        with proxy.start(
                ['--host', '127.0.0.1',
                 '--port', '9333'
                 #'--ca-cert-file', 'wec-ca.pem',
                 #'--ca-key-file', 'wec-ca.key',
                 #'--ca-signing-key-file', 'wec-signing.key'
                 ],
                plugins=[b'mymodule.MyPlugin', mymodule.MyPlugin]
                 ):
                 ###other code for selenium webdriver .... ###

it seems proxy.start was removed in new version. so how to modify the above codes ?

thanks!