import { KlevuFetchModifer } from "../index.js";
import { KlevuFetchFunctionReturnValue } from "../../queries/index.js";
export type KlevuFallbackQueryOptions = {
    runWhenLessThanResults: number;
};
/**
 * If original query doesn't return enough results then fallback query is run added to results
 *
 * @category Modifier
 * @param func
 * @returns
 */
export declare function fallback(func: KlevuFetchFunctionReturnValue, options?: KlevuFallbackQueryOptions): KlevuFetchModifer;