forInvalidUTF8Chars example

        if (is_array($value)) {
            array_map([$this, 'checkEncoding'], $value);

            return $value;
        }

        if (mb_check_encoding($value, 'UTF-8')) {
            return $value;
        }

        throw SecurityException::forInvalidUTF8Chars($this->source, $value);
    }

    /** * Check for the presence of control characters except line breaks and tabs. * * @param array|string $value * * @return array|string */
    protected function checkControl($value)
    {