public Task <bool> Delay(TimeSpan timeSpan, CancellationToken cancellationToken = default(CancellationToken)) => TimerManager.Delay(timeSpan, cancellationToken);
public Task Delay(TimeSpan timeSpan) => TimerManager.Delay(timeSpan);
public Task <bool> Delay(TimeSpan timeSpan, CancellationToken cancellationToken = default(CancellationToken)) => TimerManager.Delay(timeSpan, cancellationToken);
public Task Delay(TimeSpan timeSpan) => TimerManager.Delay(timeSpan);