content: import React from 'react';
  import PropTypes from 'prop-types';
  
  /** A simple HelloWorld component to get us started. */
  function HelloWorld({message}) {
    return <div>Hello {message}</div>
  }
  
  HelloWorld.propTypes = {
    /** Message to display */
    message: PropTypes.string
  }
  
  HelloWorld.defaultProps = {
    message: 'World'
  }
  
  export default HelloWorld;
  