protected function magic_get_navigation() {
        if ($this->_navigation === null) {
            $this->_navigation = new global_navigation($this);
        }
        return $this->_navigation;
    }
protected function magic_get_navigation() {
        if ($this->_navigation === null) {
            $this->_navigation = new global_navigation($this);
        }
        return $this->_navigation;
    }
protected function magic_get_navigation ( ) { if ( $ this -> _navigation === null ) { $ this -> _navigation = new global_navigation ( $ this ) ; } return $ this -> _navigation ; }
Return the navigation object
@return global_navigation
Return the navigation object