class_docstr: Typing variable definition.
class_docstr_tok: ["Typing","variable","definition","."]
docstr: Save a model to file in the format specific to the backend framework. This function is not supported for
  ensembles.
  
  :param filename: Name of the file where to store the model.
  :param path: Path of the folder where to store the model. If no path is specified, the model will be stored in
               the default data location of the library `ART_DATA_PATH`.
code: def save(self, filename: str, path: Optional[str] = None) -> None:
      """
      Save a model to file in the format specific to the backend framework. This function is not supported for
      ensembles.
  
      :param filename: Name of the file where to store the model.
      :param path: Path of the folder where to store the model. If no path is specified, the model will be stored in
                   the default data location of the library `ART_DATA_PATH`.
      """
      raise NotImplementedError
  
imports: from abc import ABC, ABCMeta, abstractmethod
  from typing import List, Optional, Union
  import numpy
  from art.estimators.estimator import BaseEstimator, NeuralNetworkMixin, LossGradientsMixin, DecisionTreeMixin
label_desc: Use image node_id 1 for calling the ClassifierNeuralNetwork obj's underlying member method code with example usage: obj.save(filename, path) without return types