// Asynchronous iteration --> Symbol.asyncIteratorasync function main() {    const syncIterable = [        Promise.resolve('a'),        Promise.resolve('b'),    ];    for await (const x of syncIterable) {        console.log("x", x); // a, b    }        for (const s of await Promise.all(syncIterable)) {        console.log("s", s); // a, b    }}main();