protected function handleSpecialChars(File $phpcsFile, $stackPointer, $workingString)
    {
        foreach ($this->specialChars as $testChar)
        {
            if (strpos($workingString, $testChar) !== false)
            {
                $error    = 'Please use constants (LF, CR, CRLF, ...) using concatenation instead of "%s" in double quotes';
                $errorMsg = sprintf($error, $testChar);
                $phpcsFile->addError($errorMsg, $stackPointer, 'Prduction.DisallowDoubleQuoteUsage.ContainsVar');
            }
        }
    }