public class OverLimitParser
extends Object
implements com.google.common.base.Function<String,Map<String,String>>

The expected body contains the time as in this (real) response

   {
 "overLimit" : {
  "code" : 413,
  "message" : "OverLimit Retry...",
  "details" : "Error Details...",
  "retryAt" : "2012-11-14T21:51:28UTC"
  }
 }
 

or

    {
      "overLimit": {
        "message": "This request was rate-limited.",
        "code": 413,
        "retryAfter": "54",
        "details": "Only 1 POST request(s) can be made to \"*\" every minute."
      }
    }