Future() Future[T]
	Success(value T) bool
	Failure(err error) bool
	IsCompleted() bool
	Complete(result Try[T]) bool
}

type Future[T any] interface {
	OnFailure(cb func(err error), ctx ...Executor)
	OnSuccess(cb func(success T), ctx ...Executor)
	Foreach(f func(v T), ctx ...Executor)
	OnComplete(cb func(try Try[T]), ctx ...Executor)
	IsCompleted() bool
	//	Value() Option[Try[T]]
	Failed() Future[error]