export declare class Klaviyo {
    static default: Klaviyo | undefined;
    timer: null | ReturnType<typeof setInterval>;
    exchangeId?: string;
    setExchangeId(): void;
    static init(): void;
    static getDefault(): Klaviyo;
    getExchangeId(): string | undefined;
    static generatePayload(): {
        connectorType: string;
        exchangeId: string;
    } | undefined;
}