class_docstr: Wraps a stateless metric function with the Mean metric.
code: def get_config(self):
      config = {k: v for k, v in self._fn_kwargs.items()}
      base_config = super().get_config()
      return {**base_config, **config}
  
file_path: addons/tensorflow_addons/metrics/utils.py
imports: import numpy
  import tensorflow
  from tensorflow_addons.utils.types import AcceptableDTypes
  from typeguard import typechecked
  from typing import Optional, Callable
label_desc: Use image node_id 3 for calling the MeanMetricWrapper obj's underlying member method code with example usage: obj.get_config() and returns: dict