import { ExpressionOperator } from "../../../core";
/**
 * Returns the week number in ISO 8601 format, ranging from 1 to 53.
 * Week numbers start at 1 with the week (Monday through Sunday) that contains the year's first Thursday.
 * @param obj
 * @param expr
 */
export declare const $isoWeek: ExpressionOperator<number>;
