export type BeforeExitListener = () => Promise<void> | void;
export declare class ExitHooks {
    private nextOwnerId;
    private ownerToIdMap;
    private idToListenerMap;
    private areHooksInstalled;
    install(): void;
    setListener(owner: object, listener: BeforeExitListener | undefined): void;
    getListener(owner: object): BeforeExitListener | undefined;
    private installHook;
}