async def _next_page(self):
"""Get the next page in the iterator.
Returns:
Page: The next page in the iterator or :data:`None` if
there are no pages left.
"""
if not self._has_next_page():
return None
if self.next_page_token is not None:
setattr(self._request, self._request_token_field, self.next_page_token)
response = await self._method(self._request)
self.next_page_token = getattr(response, self._response_token_field)
items = getattr(response, self._items_field)
page = Page(self, items, self.item_to_value, raw_page=response)
return page
async def _next_page(self):
if self._pages:
page, self._pages = self._pages[0], self._pages[1:]
return Page(self, page, self.item_to_value)
