why is `WebsocketMultiplexer.group_send` a class method?

why is `WebsocketMultiplexer.group_send` a class method?      Currently it's the following:        @classmethod      def group_send(cls, name, stream, payload, close=False):          message = cls.encode(stream, payload)          if close:              message["close"] = True          Group(name).send(message)      what is to stop it being the following?        def group_send(self, name, payload, close=False):          message = cls.encode(self.stream, payload)          if close:              message["close"] = True          Group(name).send(message)      `group_send` being a class method makes call more verbose than it appears neccisary      multiplexer.group_send(name='my-group', stream=multiplexer.stream, payload={})    https://github.com/django/channels/blob/8e2bbebe6d62850f0c5072b1541d96d9b932c472/channels/generic/websockets.py#L215

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