code: public String unsetUser(String uid, List<String> properties)
        throws ExecutionException, InterruptedException, IOException {
      return unsetUser(uid, properties, new DateTime());
    }
docs: Unsets properties of a user. Same as {@link #unsetUser(String, List, DateTime)
  unsetUser(String, List&lt;String&gt;, DateTime)} except event time is not specified and
  recorded as the time when the function is called.