code: def check_health(self):
      if self.should_hang:
          import time
  
          time.sleep(10000)
      elif not self.healthy:
          raise Exception("intended to fail")
  
imports: import pytest
  import ray
  from ray import serve
  from ray._private.test_utils import wait_for_condition
  from ray.exceptions import RayError
  from ray.serve._private.common import DeploymentStatus
  from ray.serve._private.constants import REPLICA_HEALTH_CHECK_UNHEALTHY_THRESHOLD, SERVE_DEFAULT_APP_NAME
label_desc: Use image node_id 2 for calling the Patient obj's underlying member method code with example usage: obj.check_health() without return types