code: def __call__(self, key, *args):
      return self[key](*args)
  
imports: from collections import defaultdict
  from multipledispatch.dispatcher import Dispatcher, expand_tuples
  from funsor.typing import Variadic, deep_type, get_origin, get_type_hints, typing_wrap
label_desc: Use image node_id 5 for calling the KeyedRegistry obj's underlying member method code with example usage: obj.__call__(key) and returns: self