CompletionObserverinterface CompletionObserver <T> {closed?: boolean;complete: () => void;error?: (err: any) => void;next?: (value: T) => void;}§Type Parameters§T[src]§Properties§closed?: boolean[src]§complete: () => void[src]§error?: (err: any) => void[src]§next?: (value: T) => void[src]