code: def touch_last_worklog(self, issue):
          
          worklogs = self.get_worklog(issue)
          if worklogs:
              last_worklog = worklogs[-1]
              last_worklog.update()
              return True
docs: Touch the last worklog for an issue (changes the updated date on the worklog).  We use this date as the 'mark' for
          determining the time elapsed for the next log entry.