Placement of default props and this default prop

It is not clear which section a default prop would be set in this example. Besides, there is not a line that sets the default prop to 0.

const Items = (props) => {
return <h1>Current Quantity of Items in Cart: {props.quantity}</h1>
}

Items.defaultProps = {
quantity: 0
}

class ShoppingCart extends React.Component {
constructor(props) {
  super(props);
}
render() {
  { /* Change code below this line */ }
  return <Items quantity={10} />
  //Would this go here?
//const defaultProps = {quantity: 0};
  { /* Change code above this line */ }
}
};

Challenge: Override Default Props

Link to the challenge:

Eureka. Default props are set after variable Items is declared. I was under the influence of constructors and thought this was one, assuming so without reading carefully.