public function copy()
    {
        return parent::copy()->setGlue($this->glue)
                             ->setPrefix($this->prefix)
                             ->setSuffix($this->suffix);
    }
public function copy()
    {
        return parent::copy()->setGlue($this->glue)
                             ->setPrefix($this->prefix)
                             ->setSuffix($this->suffix);
    }
public function copy ( ) { return parent :: copy ( ) -> setGlue ( $ this -> glue ) -> setPrefix ( $ this -> prefix ) -> setSuffix ( $ this -> suffix ) ; }
Copies the list or its extended class.

@return self
Copies the list or its extended class .