/// <summary>
 /// 列出 Project 下所有配置信息,可以通过参数进行翻页。
 /// </summary>
 /// <param name="client">client实例。</param>
 /// <param name="offset">返回记录的起始位置,默认为 0。</param>
 /// <param name="size">每页返回最大条目,默认 500(最大值)。</param>
 /// <param name="project">项目名,此参数将覆盖 client 中默认设置。</param>
 /// <returns>异步响应结果。</returns>
 /// <seealso cref="ILogServiceClient.ListConfigAsync"/>
 public static Task <IResponse <ListConfigResult> > ListConfigAsync(this ILogServiceClient client,
                                                                    Int32 offset = ListConfigRequest.DefaultOffset, Int32 size = ListConfigRequest.DefaultSize, String project = null)
 => client.ListConfigAsync(new ListConfigRequest
 {
     Offset      = offset,
     Size        = size,
     ProjectName = project
 });