content: 
  import React from 'react';
  import { storiesOf } from '@storybook/react';
  import { Button } from '@storybook/react/demo';
  
  storiesOf('Button', module)
    .add('with text', () => (
      <Button>Hello Button</Button>
    ))
    .add('with some emoji', () => (
      <Button><span role="img" aria-label="so cool">😀 😎 👍 💯</span></Button>
    ))
  