docs: def create_or_update_issue(self, title, body, culprit, labels, **kwargs):
          '''Creates or comments on existing issue in the store.
  
          :params title: title for the issue
          :params body: body, the content of the issue
          :params culprit: string used to identify the cause of the issue,
              also used for aggregation
          :params labels: (optional) list of labels attached to the issue
          :returns: issue object
          :rtype: :class:`exreporter.stores.github.GithubIssue`
          '''
          issues = self.search(q=culprit, labels=labels)
          self.time_delta = kwargs.pop('time_delta')
          self.max_comments = kwargs.pop('max_comments')
  
          if issues:
              latest_issue = issues.pop(0)
              return self.handle_issue_comment(
                  issue=latest_issue, title=title, body=body, **kwargs)
          else:
              return self.create_issue(
                  title=title, body=body, **kwargs)