/**
 * Server-side helper for determining which A/B test variant to serve
 * For use in Next.js App Router with React Server Components
 *
 * @param document The document from Payload CMS containing A/B testing data
 * @param cookies The cookies object from Next.js (from cookies() function)
 * @returns The content to display (either the variant or the original)
 */
export declare const getServerSideABVariant: <D extends {
    abVariant?: Record<string, unknown>;
    enableABTesting?: boolean;
    posthogFeatureFlagKey?: string;
}, T extends Record<string, unknown> = Record<string, unknown>>(document: D & T, cookies: {
    get: (name: string) => {
        value: string;
    } | undefined;
}) => Promise<T>;