export declare type Comparer<T> = (a: T, b: T) => number;
export declare type KeyValueComparer<TObject, TKey> = Comparer<readonly [TKey, TObject]>;
export declare function keyValueComparer<TObject, TKey>(keyComparer: Comparer<TKey>, valueComparer?: Comparer<TObject>): KeyValueComparer<TObject, TKey>;
export declare function defaultComparer<T extends {
    valueOf(): any;
}>(a: T, b: T): 1 | 0 | -1;