import { Iterator } from "../../lazy";
import { AnyObject, Options } from "../../types";
/**
 * Filters the document stream to allow only matching documents to pass unmodified into the next pipeline stage.
 *
 * See {@link https://www.mongodb.com/docs/manual/reference/operator/aggregation/match usage}.
 */
export declare function $match(coll: Iterator, expr: AnyObject, options: Options): Iterator;