so I want to rewrite this code from an arrow function to a non arrow function, how will this then be done and what will the code be?
require('isomorphic-fetch');
let items = [];
fetch("https://www.googleapis.com/books/v1/volumes?q=isbn:0747532699")
.then(res => res.json())
.then((result) => {
items = result.items;
console.log(items);
}),
(error) => {
console.log(error);
}