final protected function _loadData()
    {
        if (!$this->isLoaded()) {
            $this->_object_set = new ArrayObject();
            foreach ($this->_getData() as $object) {
                $this->insert($object);
            }
        }
    }
final protected function _loadData()
    {
        if (!$this->isLoaded()) {
            $this->_object_set = new ArrayObject();
            foreach ($this->_getData() as $object) {
                $this->insert($object);
            }
        }
    }
final protected function _loadData ( ) { if ( ! $ this -> isLoaded ( ) ) { $ this -> _object_set = new ArrayObject ( ) ; foreach ( $ this -> _getData ( ) as $ object ) { $ this -> insert ( $ object ) ; } } }
If the data is null, then load the data.
If the data is null then load the data .