```js
// .storybook/preview.js

import MarginDecorator from './MarginDecorator.svelte';

export const decorators = [(storyFn) => {
    const story = storyFun();

    return {
      Component: MarginDecorator,
      props: {
        child: story.Component,
        props: story.props
      }
    }
  }];

```