code: def dispatch(self, key, *args):
      return self[key].partial_call(*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 6 for calling the KeyedRegistry obj's underlying member method code with example usage: obj.dispatch(key) and returns: self