description: Maximum number of keepalive probes
                                        to send without response before deciding the
                                        connection is dead.
                                      maximum: 4294967295
                                      minimum: 0
                                      type: integer
                                    time:

                                      description: Maximum number of keepalive probes
                                        to send without response before deciding the
                                        connection is dead.
                                      maximum: 4294967295
                                      minimum: 0
                                      type: integer
                                    time:

        should switch to
        `tf.estimator.Estimator.experimental_export_all_saved_models`.
    *   Update `regression_head` to the new Head API for Canned Estimator V2.
    *   Switch `multi_class_head` to Head API for Canned Estimator V2.
    *   Replace all occurrences of `tf.contrib.estimator.InMemoryEvaluatorHook`
        and `tf.contrib.estimator.make_stop_at_checkpoint_step_hook` with