declare const splitBy: <T>(list: T[], chunkSize: number) => T[][];
declare const toMap: <T, K>(list: T[], keyFn: (el: T) => K) => Map<K, T>;
declare const uniqBy: <T, K>(list: T[], keyFn: (el: T) => K) => T[];
declare function notEmpty<T>(value: T | null | undefined): value is T;
export { splitBy, toMap, uniqBy, notEmpty };