recommend using new method `tflite::OpResolver::GetDelegateCreators` in
        order to achieve lazy initialization on TfLite delegate instances.

*   TF Core:

    *   `tf.Graph.get_name_scope()` now always returns a string, as documented.
        Previously, when called within `name_scope("")` or `name_scope(None)`
        contexts, it returned `None`; now it returns the empty string.