import { Iterator } from "../../lazy";
import { AnyObject, Options } from "../../types";
/**
 * Replaces a document with the specified embedded document or new one.
 * The replacement document can be any valid expression that resolves to a document.
 *
 * See {@link https://docs.mongodb.com/manual/reference/operator/aggregation/replaceRoot/ usage}.
 */
export declare function $replaceRoot(coll: Iterator, expr: {
    newRoot: AnyObject;
}, options: Options): Iterator;