def default(self, obj):
        """Encodes objects for types that aren't handled by the default
        encoder."""
        if tf.available and isinstance(obj, tf.TensorShape):
            items = obj.as_list() if obj.rank is not None else None
            return {"class_name": "TensorShape", "items": items}
        return get_json_type(obj)
Encodes objects for types that aren't handled by the default
        encoder.
keras/src/legacy/saving/json_utils.py