/**
 * Converts a JSON string into an object. If a member contains nested objects,
 * the nested objects are transformed before the parent object is.
 *
 * @param {String} text  A valid JSON string.
 * @param {Function} reviver A function that transforms the results. This function is called for each member of the object.
 *
 * @returns {*}
 */
export declare function parse<R = any>(input: string, reviver?: (this: any, key: string, value: any) => any): R | null;