public func sink( receiveValue: @escaping (Value) -> Void ) -> Cancellable
Subscribe to a stream of values over time. The subscription never fails.
A cancellable instance. Deallocation of the result will tear down the subscription stream.
public func hash(into hasher: inout Hasher)
Hashes the essential components of this value by feeding them into the given hasher.
The hasher to use when combining the components of this instance.