code: function cartToCriteoItems( cart ) {
  	return cart.products.map( product => {
  		return {
  			id: product.product_id,
  			price: product.cost,
  			quantity: product.volume,
  		};
  	} );
  }
docs: Converts the products in a cart to the format Criteo expects for its `items` property
  
  @param {Object} cart - cart as `CartValue` object
  @returns {Array} - An array of items to include in the Criteo tracking call