code: def __init__(self):
      self.healthy = True
      self.should_hang = False
  
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 1 to create a new Patient object  with example: obj = Patient()