code: def _create_record(self, rtype, name, content):
          
          result = False
          name = self._relative_name(name)
          ttl = None
  
          # TODO: shoud assert that this is an int
          if self.ttl:
              ttl = self.ttl
  
          with localzone.manage(self.filename, self.origin, autosave=True) as zone:
              if zone.add_record(name, rtype, content, ttl=ttl):  # pylint: disable=no-member
                  result = True
  
          LOGGER.debug("create_record: %s", result)
          return result
docs: Create a resource record. If a record already exists with the same
          content, do nothing.