/**
 * Returns new object with values cloned from the original object. Some objects
 * (like Sequelize or MongoDB model instances) contain circular references
 * and cause TypeError when trying to JSON.stringify() them. They may contain
 * custom toJSON() or toObject() method which allows to serialize them safely.
 * Object.assign() does not clone these methods, so the purpose of this method
 * is to use result of custom toJSON() or toObject() (if accessible)
 * for Object.assign(), but only in case of serialization failure.
 *
 * @param  obj - Object to clone
 * @returns Cloned object
 */
export declare function cloneObject<T extends Record<string, unknown>>(obj: T): T;