/**
 * The compare decorator compares two field's values and
 * shows an error message on the decorated field. The other field (compared to) does
 * not has a decorator nor receives a message.
 *
 * @param withProperty A string that represents the compared field's name.
 * @param msg A custom message.
 *
 */
export declare function Compare(withProperty: string, msg?: string): (target: object, property: string | symbol) => void;