ItemList of children.

def items(self):
        """ItemList of children."""
        if self.scraper.current_item is not self:
            self._move_here()

        if self._items is None:
            self._items = ItemList()
            self._items.scraper = self.scraper
            self._items.collection = self
            for i in self.scraper._fetch_itemslist(self):
                i.parent = self
                if i.type == TYPE_DATASET and i.dialect is None:
                    i.dialect = self.scraper.dialect
                self._items.append(i)
        return self._items