In reading about the API [rate limiting](https://api.stackexchange.com/docs/throttle), the documentation talks about a method responding with an ominous `backoff` field, and states that the client should cease from calling that method for that many seconds.

Is there a dummy method that always returns a `backoff` that I can test against?  Otherwise, what does the `backoff` field come back in the form of? 

Regular int? 
  
    { ... "backoff": 20}

a string to be parsed?

    { ... "backoff": "20"}