class_docstr: Dummy class for correctly rendering key-value tuples from dicts.
code: def __repr__(self):
      # needed for _dispatch[tuple.__repr__] not to be overridden
      return super().__repr__()
  
imports: import inspect
  import pprint
  from collections import OrderedDict
  from .._config import get_config
  from ..base import BaseEstimator
  from .None import is_scalar_nan
label_desc: Use image node_id 1 for calling the KeyValTuple obj's underlying member method code with example usage: obj.__repr__() and returns: super