public IAsyncEnumerable <IReadOnlyCollection <RestMessage> > GetMessagesAsync(IMessage fromMessage, Direction dir, int limit = DiscordConfig.MaxMessagesPerBatch, RequestOptions options = null)
 => ChannelHelper.GetMessagesAsync(this, Discord, fromMessage.Id, dir, limit, options);
 public IAsyncEnumerable <IReadOnlyCollection <RestMessage> > GetMessagesAsync(int limit = DiscordConfig.MaxMessagesPerBatch, RequestOptions options = null)
 => ChannelHelper.GetMessagesAsync(this, Discord, null, Direction.Before, limit, options);