code: public <T> Future<T> delete(String uri, Class<T> resultType, Callback<T> callback) {
  		RESTResultMapper<T> mapper = new RESTResultMapper<>(resultType);
  		Callback<HttpResp> cb = Callbacks.mapping(callback, mapper);
  		return Futures.mapping(client.req().delete(uri).execute(cb), mapper);
  	}
docs: /* DELETE