/**
 * @ignore
 */
export declare function comparer(x: any, y: any): boolean;
/**
 * @ignore
 */
export declare function comparerAsync(x: any, y: any): Promise<boolean>;
/**
 * @ignore
 */
export declare function equalityComparer<T>(key: T, minValue: T): number;
/**
 * @ignore
 */
export declare function equalityComparerAsync<T>(key: T, minValue: T): Promise<number>;