import { PipelineOperator } from "../../core";
/**
 * Removes/excludes fields from documents.
 *
 * See {@link https://www.mongodb.com/docs/manual/reference/operator/aggregation/unset usage}.
 *
 * @param collection
 * @param expr
 * @param options
 * @returns {Iterator}
 */
export declare const $unset: PipelineOperator;