public function setArchiving($archiving = null)
    {
        if ($archiving === null) {
            $this->_archiving = null;
        } else {
            $this->_archiving = $this->validateArchiving($archiving);
        }

        return $this;
    }
public function setArchiving($archiving = null)
    {
        if ($archiving === null) {
            $this->_archiving = null;
        } else {
            $this->_archiving = $this->validateArchiving($archiving);
        }

        return $this;
    }
public function setArchiving ( $ archiving = null ) { if ( $ archiving === null ) { $ this -> _archiving = null ; } else { $ this -> _archiving = $ this -> validateArchiving ( $ archiving ) ; } return $ this ; }
Sets the archiving date.

@param  \DateTime|null       $archiving

@return Page
Sets the archiving date .