class_docstr: Health check in the agent.
  
  This module adds health check related endpoint to the agent to check
  local components' health.
code: def __init__(self, dashboard_agent):
      super().__init__(dashboard_agent)
      self._health_checker = HealthChecker(
          dashboard_agent.gcs_aio_client,
          f"{dashboard_agent.ip}:{dashboard_agent.node_manager_port}",
      )
  
file_path: ray/python/ray/dashboard/modules/healthz/healthz_agent.py
imports: import ray.dashboard.utils
  import ray.dashboard.optional_utils
  from ray.dashboard.modules.healthz.utils import HealthChecker
  import ray.exceptions
  from aiohttp.web import Request, Response
label_desc: Use image node_id 1 to create a new HealthzAgent object from inherited base classes: dashboard_utils with example: obj = HealthzAgent(dashboard_agent)