import { Lifecycle } from "../../core/internal/lifecycle/Lifecycle";
import { LifecycleChangeListener } from "../../core/internal/lifecycle/LifecycleChangeListener";
export declare class IdentifierManager implements LifecycleChangeListener {
    initialize(): void;
    onLifecycleChanged(lifecycle: Lifecycle, _: number): void;
}
export declare function getUserId(): string;
export declare function setUserId(userId: string): void;
export declare function removeUserId(): void;
export declare function generateIdentifier(): string;