import type { UpdaterCustom } from './UpdaterCustom';
/**
 * @file Type Definitions - UpdaterJSON
 * @module grease/types/UpdaterJSON
 */
/**
 * Updates `.json` files.
 */
export declare type UpdaterJSON = UpdaterCustom & {
    /**
     * Returns a boolean indicating if the package is private or not.
     *
     * @param {string} contents - File content
     * @return {boolean} `true` if private, `false` otherwise
     */
    isPrivate(contents: string): boolean;
};