docs: def IsRunning(self):
      """Returns True if there's a currently running iteration of this job."""
      current_urn = self.Get(self.Schema.CURRENT_FLOW_URN)
      if not current_urn:
        return False
  
      try:
        current_flow = aff4.FACTORY.Open(
            urn=current_urn, aff4_type=flow.GRRFlow, token=self.token, mode="r")
      except aff4.InstantiationError:
        # This isn't a flow, something went really wrong, clear it out.
        logging.error("Unable to open cron job run: %s", current_urn)
        self.DeleteAttribute(self.Schema.CURRENT_FLOW_URN)
        self.Flush()
        return False
  
      return current_flow.GetRunner().IsRunning()