code: def _ensure_classification(self):
          
          # if this note was automatically filed, don't update the auto-classification information
          if not self.user:
              return
  
          # if the failure type isn't intermittent, ignore
          if self.failure_classification.name not in ["intermittent", "intermittent needs filing"]:
              return
  
          # if the linked Job has more than one TextLogError, ignore
          text_log_error = self.job.get_manual_classification_line()
          if not text_log_error:
              return
  
          # evaluate the QuerySet here so it can be used when creating new_bugs below
          existing_bugs = list(ClassifiedFailure.objects.filter(error_matches__text_log_error=text_log_error)
                                                        .values_list('bug_number', flat=True))
  
          new_bugs = (self.job.bugjobmap_set.exclude(bug_id__in=existing_bugs)
                                            .values_list('bug_id', flat=True))
  
          if not new_bugs:
              return
  
          # Create Match instances for each new bug
          for bug_number in new_bugs:
              classification, _ = ClassifiedFailure.objects.get_or_create(bug_number=bug_number)
              text_log_error.create_match("ManualDetector", classification)
  
          # if there's only one new bug and no existing ones, verify it
          if len(new_bugs) == 1 and not existing_bugs:
              text_log_error.verify_classification(classification)
docs: Ensures a single TextLogError's related bugs have Classifications.
  
          If the linked Job has a single meaningful TextLogError:
           - find the bugs currently related to it via a Classification
           - find the bugs mapped to the job related to this note
           - find the bugs that are mapped but not classified
           - link this subset of bugs to Classifications
           - if there's only one new bug and no existing ones, verify it