Get an iterator of the 'items' in each page. Instead of a feature
        collection from each page, the iterator yields the features.

        :param int limit: The number of 'items' to limit to.
        :return: iter of items in page

def items_iter(self, limit):
        '''Get an iterator of the 'items' in each page. Instead of a feature
        collection from each page, the iterator yields the features.

        :param int limit: The number of 'items' to limit to.
        :return: iter of items in page
        '''

        pages = (page.get() for page in self._pages())
        items = itertools.chain.from_iterable(
            (p[self.ITEM_KEY] for p in pages)
        )
        if limit is not None:
            items = itertools.islice(items, limit)
        return items