```js
// ButtonGroup.stories.js

import ButtonGroup from '../ButtonGroup.svelte';
import * as ButtonStories from './Button.stories';

export default {
  title: 'ButtonGroup',
  component: ButtonGroup,
}

const Template = (args) => ({
  Component: ButtonGroup,
  props: args,
 });

export const Pair = Template.bind({});
Pair.args = {
  buttons: [
    { ...ButtonStories.Primary.args },
    { ...ButtonStories.Secondary.args }
  ],
  orientation: 'horizontal',
};
```