/// <summary>
/// 异步获取创建时间。
/// </summary>
/// <typeparam name="TCreatedTime">指定的创建时间类型（兼容 <see cref="DateTime"/> 或 <see cref="DateTimeOffset"/>）。</typeparam>
/// <param name="creationTime">给定的 <see cref="ICreationTime{TCreatedTime}"/>。</param>
/// <param name="newCreatedTimeFactory">给定的新创建时间工厂方法。</param>
/// <param name="cancellationToken">给定的 <see cref="CancellationToken"/>（可选）。</param>
/// <returns>返回一个包含 <typeparamref name="TCreatedTime"/> （兼容 <see cref="DateTime"/> 或 <see cref="DateTimeOffset"/>）的异步操作。</returns>
public static ValueTask <TCreatedTime> SetCreatedTimeAsync <TCreatedTime>(this ICreationTime <TCreatedTime> creationTime,
Func <TCreatedTime, TCreatedTime> newCreatedTimeFactory, CancellationToken cancellationToken = default)
where TCreatedTime : struct
=> cancellationToken.RunValueTask(() => creationTime.CreatedTime = newCreatedTimeFactory(creationTime.CreatedTime));
/// <summary>
/// 获取创建时间。
/// </summary>
/// <typeparam name="TCreatedTime">指定的创建时间类型（兼容 <see cref="DateTime"/> 或 <see cref="DateTimeOffset"/>）。</typeparam>
/// <param name="creationTime">给定的 <see cref="ICreationTime{TCreatedTime}"/>。</param>
/// <param name="newCreatedTimeFactory">给定的新创建时间工厂方法。</param>
/// <returns>返回 <typeparamref name="TCreatedTime"/>（兼容 <see cref="DateTime"/> 或 <see cref="DateTimeOffset"/>）。</returns>
public static TCreatedTime SetCreatedTime <TCreatedTime>(this ICreationTime <TCreatedTime> creationTime,
Func <TCreatedTime, TCreatedTime> newCreatedTimeFactory)
where TCreatedTime : struct
=> creationTime.CreatedTime = newCreatedTimeFactory(creationTime.CreatedTime);