code: public Operation deleteAccessConfig(
        String networkInterface, String accessConfig, OperationOption... options) {
      return compute.deleteAccessConfig(getInstanceId(), networkInterface, accessConfig, options);
    }
docs: Deletes an access configuration from the provided network interface for this instance.
  
  @return a zone operation if the delete request was issued correctly, {@code null} if the
  instance was not found
  @throws ComputeException upon failure