code: def typedef_callable_handle(tokens):
      
      if len(tokens) == 1:
          return '_coconut.typing.Callable[..., ' + tokens[0] + ']'
      elif len(tokens) == 2:
          return '_coconut.typing.Callable[[' + tokens[0] + '], ' + tokens[1] + ']'
      else:
          raise CoconutInternalException("invalid Callable typedef tokens", tokens)
docs: Process -> to Callable inside type annotations.