keras/src/layers/preprocessing/feature_space.py/FeatureSpace/get_config
class FeatureSpace:    def get_config(self):
        return {
            "features": serialization_lib.serialize_keras_object(self.features),
            "output_mode": self.output_mode,
            "crosses": serialization_lib.serialize_keras_object(self.crosses),
            "crossing_dim": self.crossing_dim,
            "hashing_dim": self.hashing_dim,
            "num_discretization_bins": self.num_discretization_bins,
        }