class App extends React.Componet{
  render(){
    return (
      <div>
        {this.props.value}
        {this.props.secondValue}
        {this.props.thirdValue}
      </div>
    )
  }
}


App.propTypes = {
  value: React.PropTypes.string,
  secondValue: React.PropType.number,
  thirdValue: React.PropTypes.andy.isRequired
}