code: def get_fn_args(fn, kwargs: dict, prefix: str = None):
      all_args = get_all_args(fn)
      required_args = get_required_args(fn)
      fn_kwargs = pick_kwargs(kwargs, all_args, prefix)
      missing_args = [arg for arg in required_args if arg not in fn_kwargs]
      if missing_args:
          raise ValueError(
              'The following args are missing for the function '
              '{}: {}.'.format(fn.__name__, missing_args)
          )
      return fn_kwargs