def _fetch_session_offer(self):
        offer = self._fetch_object('metadata')
        if offer is None and self.update:
            offer = self.offer
        return offer
Builds list of symlinks URNs for the approval object.
dataset/ETHPy150Open django-oscar/django-oscar/src/oscar/apps/dashboard/offers/views.py/OfferWizardStepView._fetch_session_offer--crossover with--dataset/ETHPy150Open google/grr/grr/lib/aff4_objects/security.py/RequestCronJobApprovalFlow.BuildApprovalSymlinksUrns