code: def UpdateHuntOutputPluginState(self, hunt_id, state_index, update_fn):
      
  
      if hunt_id not in self.hunts:
        raise db.UnknownHuntError(hunt_id)
  
      try:
        state = rdf_flow_runner.OutputPluginState.FromSerializedString(
            self.hunt_output_plugins_states[hunt_id][state_index])
      except KeyError:
        raise db.UnknownHuntOutputPluginError(hunt_id, state_index)
  
      state.plugin_state = update_fn(state.plugin_state)
  
      self.hunt_output_plugins_states[hunt_id][
          state_index] = state.SerializeToString()
  
      return state.plugin_state
docs: Updates hunt output plugin state for a given output plugin.