declare type ValueComparator = (a?: any, b?: any) => number;
declare type ValueGetter = (item: any) => any;
declare type ChainItem<T> = {
    comparator?: ValueComparator;
    reverse?: boolean;
    valueGetter: ValueGetter;
};
export declare function sortByChain<T>(array: T[], chain: ChainItem<T>[]): T[];
export declare function sortBy<T>(array: T[], ...keys: string[]): T[];
export {};