import type { FieldHook } from 'payload';
/**
 * Field hook for a System Page role relationship in SiteSettings: ensures a page
 * isn't assigned to two roles at once (e.g. the same page as both homepage and
 * privacyPolicy), which would make routing ambiguous.
 *
 * Attach to each role field's beforeValidate. `siblingFields` are the OTHER role
 * field names to check against.
 *
 *   hooks: { beforeValidate: [buildValidateUniqueRole({
 *     siblingFields: ['privacyPolicy', 'cookiePolicy', 'termsOfService'],
 *   })] }
 */
export declare function buildValidateUniqueRole(args: {
    siblingFields: string[];
}): FieldHook;