public function readLine(int $line = 1) : string
    {
        $lines = file($this->_path);

        if($line > count($lines)) {
            throw new LineNumberAboveFileLines($this->_path, $line, count($lines));
        }

        if($line <= 0) {
            $line = 1;
        }

        return $lines[($line - 1)];
    }