Iterate thru the request pages until all items have been processed

def _unpaginate(self, domain, initial_op, *, on_properties):
        """Iterate thru the request pages until all items have been processed"""
        request = initial_op(domain)
        while request is not None:
            result = self._retry_on_reset(request, request.execute)
            for on_property in on_properties:
                items = result.get(on_property)
                if items is not None:
                    yield on_property, items
            request = domain.list_next(request, result)