storybook/docs/snippets/react/app-story-with-mock.js.mdx

```js
// App.stories.js

import React from 'react';

import App from './App';

export default {
  title: 'App',
  component: App,
};

const Template = (args) => <App {...args} />;

export const Success = Template.bind({});
Success.parameters = {
  fetch: {
    json: {
      JavaScript: 3390991,
      'C++': 44974,
      TypeScript: 15530,
      CoffeeScript: 12253,
      Python: 9383,
      C: 5341,
      Shell: 5115,
      HTML: 3420,
      CSS: 3171,
      Makefile: 189,
    }
  }
};
```