code: def overload(func):
      
      if sys.version_info < (3, 3):
          raise OverloadingError("The 'overload' syntax requires Python version 3.3 or higher.")
      fn = unwrap(func)
      ensure_function(fn)
      fname = get_full_name(fn)
      if fname.find('<locals>') >= 0:
          raise OverloadingError("The 'overload' syntax cannot be used with nested functions. "
                                 "Decorators must use functools.wraps().")
      try:
          return register(__registry[fname], func)
      except KeyError:
          __registry[fname] = overloaded(func)
          return __registry[fname]
docs: May be used as a shortcut for ``overloaded`` and ``overloads(f)``
      when the overloaded function `f` can be automatically identified.