artesanias/node_modules/localforage/src/utils/normalizeKey.js

export default function normalizeKey(key) {
    // Cast the key to a string, as that's all we can set as a key.
    if (typeof key !== 'string') {
        console.warn(`${key} used as a key, but it is not a string.`);
        key = String(key);
    }

    return key;
}