*   Canned Estimators don’t support `input_layer_partitioner` arg in the
        API. If you have this arg, you will have to switch to `tf.compat.v1
        canned Estimators`.
    *   `Estimator.export_savedmodel` has been renamed to `export_saved_model`.
    *   When saving to SavedModel, Estimators will strip default op attributes.
        This is almost always the correct behavior, as it is more forwards