docs: def iter_grants(self, as_json=True):
          """Fetch grants from a remote OAI-PMH endpoint.
  
          Return the Sickle-provided generator object.
          """
          records = self.client.ListRecords(metadataPrefix='oaf',
                                            set=self.setspec)
          for rec in records:
              try:
                  grant_out = rec.raw  # rec.raw is XML
                  if as_json:
                      grant_out = self.grantxml2json(grant_out)
                  yield grant_out
              except FunderNotFoundError as e:
                  current_app.logger.warning("Funder '{0}' not found.".format(
                      e.funder_id))