class_docstr: Raise ``NotImplementedError`` when called.
code: def __call__(self, *args, **kwargs):
      types = tuple(type(a) for a in args)
      raise NotImplementedError(
          "Ambiguous signature for %s: <%s>"
          % (self.dispatcher.name, str_signature(types))
      )
  
imports: from __future__ import annotations
  from warnings import warn
  import inspect
  from .conflict import ordering, ambiguities, super_signature, AmbiguityWarning
  from .utils import expand_tuples
  import itertools
label_desc: Use image node_id 2 for calling the RaiseNotImplementedError obj's underlying member method code with example usage: obj.__call__() without return types