Eduardokum\LaravelBoleto\Boleto\Render\AbstractPdf::_putpages PHP Method

    function _putpages()
    {
        $nb = $this->page;
        if (!empty($this->PageGroups)) {
            // do page number replacement
            foreach ($this->PageGroups as $k => $v) {
                for ($n = 1; $n <= $nb; $n++) {
                    $this->pages[$n] = str_replace($k, $v, $this->pages[$n]);
                }
            }
        }
        parent::_putpages();
    }