private function printMetaTagsList()
    {
        foreach($this->metaList as $metaName=>$metaData){
            if(in_array($metaName, $this->allowedDuplicateMeta)) {
                foreach($metaData as $duplicateMetaData){
                    print '<meta '.$duplicateMetaData['type'].'="'.$metaName.'" content="'.$duplicateMetaData['content'].'" />'.$this->newLines;
                }
            }else{
                print '<meta '.$metaData['type'].'="'.$metaName.'" content="'.$metaData['content'].'" />'.$this->newLines;
            }

        }
        return $this;
    }