import { Options } from '../../../core';
/**
 * Selects a subset of the array to return an array with only the elements that match the filter condition.
 *
 * @param  {Object} obj  [description]
 * @param  {*} expr [description]
 * @return {*}      [description]
 */
export declare function $filter(obj: object, expr: any, options: Options): any;