import { QueryCacheNotifyEvent, QueryClient, QueryKey } from '@tanstack/react-query';
export declare function formatData(event: QueryCacheNotifyEvent, queryClient: QueryClient): {
    eventType: "updated";
    queryKey: QueryKey;
    queryHash: string;
    timestamp: Date;
    queryData: unknown;
} | {
    eventType: "removed";
    queryKey: QueryKey;
    queryHash: string;
    timestamp: Date;
    queryData?: undefined;
} | null | undefined;