public protocol PromiseType

var result: Result<Element, Swift.Error>?

var isIdle: Bool

var isPending: Bool

var isResolved: Bool

var isFulfilled: Bool

var isRejected: Bool

var value: Element?

var error: Swift.Error?

func resolve(_ result: Result<Element, Swift.Error>?) -> Self?

func fulfill(_ value: Element) -> Self

func reject(_ error: Swift.Error) -> Self