protected function userDefinedVars($file)
    {
        $start = $this->delimiter[0];
        $end = $this->delimiter[1];

        if ($this->customData !== null) {
            $customVars = explode(';', $this->customData);
            foreach ($customVars as $rawVar) {
                $arrayVar = explode('=', $rawVar);
                File::put($file, str_replace($start . $arrayVar[0] . $end, $arrayVar[1], File::get($file)));
            }
        }
    }