code: @Override protected Response jobDone(final Key dest) {
      Response resp;
      if (UKV.get(dest) == null)
        resp = Response.error("start times must be strictly less than stop times");
      else
        resp = CoxPHModelView.redirect(this, dest);
      return resp;
    }
docs: Return {@link water.api.RequestBuilders.Response} for finished job.