code: public ChangeRequest reload(Dns.ChangeRequestOption... options) {
      return dns.getChangeRequest(zone, getGeneratedId(), options);
    }
docs: Retrieves the up-to-date information about the change request from Google Cloud DNS. Parameter
  {@code options} can be used to restrict the fields to be included in the updated object the
  same way as in {@link Dns#getChangeRequest(String, String, Dns.ChangeRequestOption...)}. If
  {@code options} are provided, any field other than generatedId which is not included in the
  {@code options} will be {@code null} regardless of whether they are initialized or not in
  {@code this} instance.
  
  @return an object with the updated information or {@code null} if it does not exist
  @throws DnsException upon failure of the API call or if the associated zone was not found