Interface Extensions

interface Extensions {
    contains(str, elem): boolean;
    is(str, pattern, modifiers): boolean;
    isIPv4(str): boolean;
    isIPv6(str): boolean;
    isUrl(str): boolean;
    len(str, min, max): boolean;
    max(str, val): boolean;
    min(str, val): boolean;
    not(str, pattern, modifiers): boolean;
    notContains(str, elem): boolean;
    notEmpty(str): boolean;
    notIn(str, values): boolean;
    notRegex(str, pattern, modifiers): boolean;
    regex(str, pattern, modifiers): boolean;
}