@internationalizeDocstring
    def part(self, irc, msg, args, channel):
        self.registryValue('channels').discard(channel)
        for otherIrc in world.ircs:
            if channel in otherIrc.state.channels:
                otherIrc.queueMsg(ircmsgs.part(channel))
        irc.replySuccess()
optional field, might not exist
dataset/ETHPy150Open ProgVal/Limnoria/plugins/Relay/plugin.py/Relay.part--crossover with--dataset/ETHPy150Open conan-io/conan/conans/client/conf/__init__.py/ConanClientConfigParser.proxies