public function appendPageCSS(string $str): PdfInterface
    {
        $this->setProperty('pageCSS', $str);
        $this->mpdf->WriteHTML($this->pageCSS, 1);

        return $this;
    }
public function appendPageCSS(string $str): PdfInterface
    {
        $this->setProperty('pageCSS', $str);
        $this->mpdf->WriteHTML($this->pageCSS, 1);

        return $this;
    }
public function appendPageCSS ( string $ str ) : PdfInterface { $ this -> setProperty ( 'pageCSS' , $ str ) ; $ this -> mpdf -> WriteHTML ( $ this -> pageCSS , 1 ) ; return $ this ; }
Append a CSS style.

@param string $str The string data used for render

@return PdfInterface The current instance

@api
Append a CSS style .