hunk.code_window:             action_vector[i] = action_dict[i][_DUMMY_AGENT_ID]
           self.new_obs, self.cur_rewards, self.cur_dones, self.cur_infos = \
               self.vector_env.vector_step(action_vector)
       @override(BaseEnv)
       def try_reset(self, env_id: Optional[EnvID] = None) -> MultiAgentDict:
           from ray.rllib.env.base_env import _DUMMY_AGENT_ID
           assert env_id is None or isinstance(env_id, int)
  
hunk.labels: keep keep keep keep keep replace keep keep
hunk.after_edit:     def try_reset(self, env_id: Optional[EnvID] = None) -> MultiEnvDict:
  
hunk.file_path: rllib/env/vector_env.py
hunk.type: replace
file: #pragma once
  
  #include "channel/channel.h"
  
  namespace ray {
  namespace streaming {
  class ProducerTransfer;
  /// We devise a flow control system in queue channel, and that's called flow
  /// control by unconsumed seq. Upstream worker will detect consumer statistics via
  /// api so it can keep fixed length messages in this process, which makes a
  /// continuous datastream in channel or on the transporting way, then downstream
  /// can read them from channel immediately.
  /// To debug or compare with theses flow control methods, we also support
  /// no-flow-control that will do nothing in transporting.
  class FlowControl {
   public:
    virtual ~FlowControl() = default;
    virtual bool ShouldFlowControl(ProducerChannelInfo &channel_info) = 0;
  };
  
  class NoFlowControl : public FlowControl {
   public:
    bool ShouldFlowControl(ProducerChannelInfo &channel_info) { return false; }
    ~NoFlowControl() = default;
  };
  
  class UnconsumedSeqFlowControl : public FlowControl {
   public:
    UnconsumedSeqFlowControl(
        std::unordered_map<ObjectID, std::shared_ptr<ProducerChannel>> &channel_map,
        uint32_t step);
    ~UnconsumedSeqFlowControl() = default;
    bool ShouldFlowControl(ProducerChannelInfo &channel_info);
  
   private:
    /// NOTE(wanxing.wwx) Reference to channel_map_ variable in DataWriter.
    /// Flow-control is checked in FlowControlThread, so channel_map_ is accessed
    /// in multithread situation. Especially, while rescaling, channel_map_ maybe
    /// changed. But for now, FlowControlThread is stopped before rescaling.
    std::unordered_map<ObjectID, std::shared_ptr<ProducerChannel>> &channel_map_;
    uint32_t consumed_step_;
  };
  }  // namespace streaming
  }  // namespace ray
  