/**
 * Set Expression Operators: https://docs.mongodb.com/manual/reference/operator/aggregation/#set-expression-operators
 */
import { ExpressionOperator } from "../../../core";
/**
 * Takes two arrays and returns true when the first array is a subset of the second,
 * including when the first array equals the second array, and false otherwise.
 *
 * @param obj
 * @param expr
 */
export declare const $setIsSubset: ExpressionOperator;
