Is the following use of next() allowed?

    const changes = { ... }
    let v0 = g.V(0);
    if (!(await v0.next()).value) {
        throw Error("Vertex not found.")
    }
    for (const [key, value] of Object.entries(changes)) {
        v0 = v0.property(key, value);
    }
    await v0.next();