class_docstr: Class to contain ArviZ default parameters.
  
  It is implemented as a dict with validation when setting items.
class_docstr_tok: ["Class","to","contain","ArviZ","default","parameters",".","It","is","implemented","as","a","dict","with","validation","when","setting","items","."]
docstr: Use underlying dict's len method.
docstr_tok: ["Use","underlying","dict","'s","len","method","."]
code: def __len__(self):
      """Use underlying dict's len method."""
      return len(self._underlying_storage)
  
imports: import locale
  import logging
  import os
  import pprint
  import re
  import sys
  import warnings
  from collections.abc import MutableMapping
  from pathlib import Path
  from typing import Any, Dict
  from typing_extensions import Literal
  import numpy
label_desc: Use image node_id 12 for calling the RcParams obj's underlying member method code with example usage: obj.__len__() and returns: len