code: def __init__(self, dashboard_head):
      super().__init__(dashboard_head)
      # ActorInfoGcsService
      self._gcs_actor_info_stub = None
      # A queue of dead actors in order of when they died
      self.dead_actors_queue = deque()
  
      # -- Internal states --
      self.total_published_events = 0
      self.subscriber_queue_size = 0
      self.accumulative_event_processing_s = 0
  
file_path: ray/dashboard/modules/actor/actor_head.py
imports: import asyncio
  import logging
  import os
  import time
  from collections import deque
  import aiohttp.web
  import ray.dashboard.optional_utils
  import ray.dashboard.utils
  from ray._private.gcs_pubsub import GcsAioActorSubscriber
  from ray.core.generated import gcs_service_pb2, gcs_service_pb2_grpc
  from ray.dashboard.datacenter import DataSource, DataOrganizer
  from ray.dashboard.modules.actor import actor_consts
  from ray.dashboard.optional_utils import rest_response
label_desc: Use image node_id 1 to create a new ActorHead object from inherited base classes: dashboard_utils with example: obj = ActorHead(dashboard_head)