public function getTab()
    {
        if (is_null($this->tab)) {
            $this->tab = new Tab($this);
        }

        return $this->tab;
    }
public function getTab()
    {
        if (is_null($this->tab)) {
            $this->tab = new Tab($this);
        }

        return $this->tab;
    }
public function getTab ( ) { if ( is_null ( $ this -> tab ) ) { $ this -> tab = new Tab ( $ this ) ; } return $ this -> tab ; }
Get Tab instance.

@return Tab
Get Tab instance .