keras/src/layers/preprocessing/feature_space.py/FeatureSpace/save
class FeatureSpace:    def save(self, filepath):
        """Save the `FeatureSpace` instance to a `.keras` file.

        You can reload it via `keras.models.load_model()`:

        ```python
        feature_space.save("featurespace.keras")
        reloaded_fs = keras.models.load_model("featurespace.keras")
        ```
        """
        saving_lib.save_model(self, filepath)