import { Iterator } from "../../lazy";
import type { Any, AnyObject, Options } from "../../types";
interface InputExpr {
    /** Collection for the $graphLookup operation to search. */
    from: string | AnyObject[];
    /** Expression that specifies the value of the connectFromField with which to start the recursive search. */
    startWith: Any;
    /** Field name whose value $graphLookup uses to recursively match against the connectToField. */
    connectFromField: string;
    /** Field name in other documents against which to match the value of the field. */
    connectToField: string;
    /** Name of the array field added to each output document. */
    as: string;
    /** Non-negative integral number specifying the maximum recursion depth. */
    maxDepth?: number;
    /** Name of the field to add to each traversed document in the search path. */
    depthField?: string;
    /** A document specifying additional conditions for the recursive search. The syntax is identical to query filter syntax. */
    restrictSearchWithMatch?: AnyObject;
}
/**
 * Performs a recursive search on a collection.
 * To each output document, adds a new array field that contains the traversal results of the recursive search for that document.
 *
 * See {@link https://www.mongodb.com/docs/manual/reference/operator/aggregation/graphLookup/ usage}.
 */
export declare function $graphLookup(coll: Iterator, expr: InputExpr, options: Options): Iterator;
export {};