public static function extIs($value)
    {
        if (static::is($value)) {
            return true;
        }

        if (is_string($value)) {
            // This function should be case insensitive so let's compare to the lower-cased input string.
            $value = strtolower($value);
            return (static::isTrueStrExt($value) || static::isFalseStrExt($value));
        }

        return false;
    }