code: def to_proto(self) -> bytes:
      # TODO(simon): enable cross language user config
      return DeploymentVersionProto(
          code_version=self.code_version,
          deployment_config=self.deployment_config.to_proto(),
          ray_actor_options=json.dumps(self.ray_actor_options),
          placement_group_bundles=json.dumps(
              self.placement_group_bundles
          )
          if self.placement_group_bundles is not None
          else "",
          placement_group_strategy=self.placement_group_strategy
          if self.placement_group_strategy is not None
          else "",
          max_replicas_per_node=self.max_replicas_per_node
          if self.max_replicas_per_node is not None
          else 0,
      )
  
imports: import json
  import logging
  from abc import ABC
  from copy import deepcopy
  from typing import Any, Dict, List, Optional
  from zlib import crc32
  from ray._private.pydantic_compat import BaseModel
  from ray.serve._private.config import DeploymentConfig
  from ray.serve._private.utils import DeploymentOptionUpdateType, get_random_string
  from ray.serve.generated.serve_pb2 import DeploymentVersion
label_desc: Use image node_id 9 for calling the DeploymentVersion obj's underlying member method code with example usage: obj.to_proto() and returns: DeploymentVersionProto