}

    @Override
    public boolean contains(@CheckForNull Object obj) {
      if (obj instanceof List) {
        List<?> list = (List<?>) obj;
        return isPermutation(inputList, list);
      }
      return false;
    }

    @Override
    public String toString() {
      return "orderedPermutationCollection(" + inputList + ")";
    }
  }

    }

    @Override
    public boolean contains(@CheckForNull Object obj) {
      if (obj instanceof List) {
        List<?> list = (List<?>) obj;
        return isPermutation(inputList, list);
      }
      return false;
    }

    @Override
    public String toString() {
      return "orderedPermutationCollection(" + inputList + ")";
    }
  }