/// <summary>
/// Stop hosted command handler.
/// </summary>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Asynchronous task which can be awaited until the last received command has finished processing.</returns>
public virtual Task Stop(CancellationToken cancellationToken = default(CancellationToken))
{
OnStop();
return(_internalCommandSource.StopReceiving(cancellationToken));
}
