code: def inc(self):
      self.i += 1
  
file_path: ray/python/ray/serve/tests/test_deployment_node.py
imports: import pytest
  import ray
  from ray import serve
  from ray.serve._private.deployment_node import DeploymentNode
label_desc: Use image node_id 2 for calling the SyncActor obj's underlying member method code with example usage: obj.inc() without return types