text: // v5
  function render() {
    const {
      fields: {
        contact: {
          shipping: { street }
          }
        }
      } = this.props;
    return (
      <div>
        <input type="text" {...street}/>
      </div>
    )
  }
  
  // v6
  // You simply use dot-syntax on your field name.
  function render() {
    return (
      <div>
        <Field name="contact.shipping.street" component="input" type="text"/>
      </div>
    )
  }