async

type Promise[T any] interface {
	// Settled indicates if a call to Await will cause a blocking behavior, or
	// if the result will be immediately returned.
	Settled() bool

	// Await will cause the calling code to block and wait for the promise to
	// settle. Await MUST be able to be called by multiple goroutines and safely
	// deliver the same value/error to all waiting goroutines. Successive calls
	// to Await should continue to respond with the result even once the promise
	// is settled.
	Await(context.Context) (T, error)
}