[feature columns](https://www.tensorflow.org/get_started/feature_columns)
    and [losses](https://www.tensorflow.org/api_docs/python/tf/losses) to
    [gradient boosted trees estimators](https://github.com/tensorflow/models/tree/master/official/r1/boosted_trees).
*   The
    [python interface](https://www.tensorflow.org/versions/r1.9/api_docs/python/tf/lite)
    for the