content: import React from 'react'
  
  export const Settings = (props) => (
    <div style={{ margin: '0 auto' }} >
      <h2>Settings: {props.settings}</h2>
      <button className="btn btn-default" onClick={props.increment}>
        Increment
      </button>
      {' '}
      <button className="btn btn-default" onClick={props.doubleAsync}>
        Double (Async)
      </button>
    </div>
  )
  
  Settings.propTypes = {
    settings     : React.PropTypes.number.isRequired,
    doubleAsync : React.PropTypes.func.isRequired,
    increment   : React.PropTypes.func.isRequired
  }
  
  export default Settings
  