code: def verify_classification(self, classification):
          
          if classification not in self.classified_failures.all():
              self.create_match("ManualDetector", classification)
  
          # create a TextLogErrorMetadata instance for this TextLogError if it
          # doesn't exist.  We can't use update_or_create here since OneToOne
          # relations don't use an object manager so a missing relation is simply
          # None as opposed to RelatedManager.
          if self.metadata is None:
              TextLogErrorMetadata.objects.create(text_log_error=self,
                                                  best_classification=classification,
                                                  best_is_verified=True)
          else:
              self.metadata.best_classification = classification
              self.metadata.best_is_verified = True
              self.metadata.save(update_fields=['best_classification', 'best_is_verified'])
  
          self.metadata.failure_line.elastic_search_insert()
  
          # Send event to NewRelic when a verifing an autoclassified failure.
          match = self.matches.filter(classified_failure=classification).first()
          if not match:
              return
  
          newrelic.agent.record_custom_event('user_verified_classification', {
              'matcher': match.matcher_name,
              'job_id': self.id,
          })
docs: Mark the given ClassifiedFailure as verified.
  
          Handles the classification not currently being related to this
          TextLogError and no Metadata existing.