export declare type Experiments = {
    [id: string]: unknown;
};
export declare type Properties = {
    [key: string]: unknown;
};
export declare type ElementImporter = (() => Promise<unknown>);
export declare enum TestEvent {
    UPDATE = "update"
}
export interface ITest {
    has(id: string): boolean;
    set<T>(id: string, value: T): void;
    setAll(tests: Experiments): void;
    get<T>(id: string): T | undefined;
    getAll(): Experiments;
    remove(id: string): void;
    removeAll(): void;
    save(): void;
    load(): void;
    getVariation<T>(variations: T[]): T;
    addEventListener(type: TestEvent, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
    removeEventListener(type: TestEvent, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
}