public function setUserId( $userId )
    {
        $this->_user    = null;
        $this->userId   = ( (int) $userId ) ?: null;
        return $this;
    }
public function setUserId( $userId )
    {
        $this->_user    = null;
        $this->userId   = ( (int) $userId ) ?: null;
        return $this;
    }
public function setUserId ( $ userId ) { $ this -> _user = null ; $ this -> userId = ( ( int ) $ userId ) ? : null ; return $ this ; }
Set user-id

@param int $userId
@return \Grid\Paragraph\Model\Paragraph\Structure\Content
Set user - id