import { CompletionObserver, Unsubscribable, TeardownLogic } from "rxjs";
export declare function isCompletionObserver(obj: any): obj is CompletionObserver<any>;
export declare function isUnsubscribable(obj: any): obj is Unsubscribable;
export declare function isTeardownLogic(teardown: any): teardown is TeardownLogic;