def add_msg_handler(self, handler_fn: HandlerFn) -> SubscriptionAPI:
self._msg_handlers.add(handler_fn)
cancel_fn = functools.partial(self._msg_handlers.remove, handler_fn)
return Subscription(cancel_fn)
def add_msg_handler(self, handler_fn: HandlerFn) -> SubscriptionAPI:
self._msg_handlers.add(handler_fn)
cancel_fn = functools.partial(self._msg_handlers.remove, handler_fn)
return Subscription(cancel_fn)