import type { Tree } from '@nx/devkit';
type JSONValue = string | number | boolean | JSONArray | null | undefined;
type JSONArray = JSONValue[];
export type JSONObject = Record<string, JSONValue | Record<string, JSONValue>>;
export declare const updateJestConfig: (tree: Tree, path: string, update: (current: JSONObject) => JSONObject, addLiteral?: () => string) => void;
export {};