public function preOutputBlankLine($ifPrevNotBlank = false)
    {
        if (!$ifPrevNotBlank) {
            $this->code = PHP_EOL.$this->code;
            $this->lastLine = PHP_EOL;
            ++$this->currentPrints;
        } else {
            if (trim($this->lastLine)) {
                $this->code = PHP_EOL.$this->code;
                $this->lastLine = PHP_EOL;
                ++$this->currentPrints;
            }
        }
    }