public BodyStream(Func<ArraySegment<byte>, Action<Exception>, Owin.TempEnum> write, Action<Exception> end, CancellationToken cancellationToken)
{
stateMachine = new StateMachine<BodyStreamCommand, BodyStreamState>();
stateMachine.Initialize(BodyStreamState.Ready);
stateMachine.MapTransition(BodyStreamCommand.Pause, BodyStreamState.Paused);
stateMachine.MapTransition(BodyStreamCommand.Start, BodyStreamState.Started);
stateMachine.MapTransition(BodyStreamCommand.Cancel, BodyStreamState.Cancelled);
stateMachine.MapTransition(BodyStreamCommand.Resume, BodyStreamState.Resumed);
stateMachine.MapTransition(BodyStreamCommand.Stop, BodyStreamState.Stopped);
Write = write;
End = end;
CancellationToken = cancellationToken;
}