import { Iterator } from "../../lazy";
import { AnyObject, Options } from "../../types";
/**
 * Restricts the contents of the documents based on information stored in the documents themselves.
 *
 * See {@link https://docs.mongodb.com/manual/reference/operator/aggregation/redact/ usage}
 */
export declare function $redact(coll: Iterator, expr: AnyObject, options: Options): Iterator;