code: def test_config_schemas_forward_compatible():
      # Test configs ignoring unknown keys (required for forward-compatibility)
      ServeDeploySchema(
          http_options=HTTPOptionsSchema(
              new_version_config_key="this config is from newer version of Ray"
          ),
          applications=[
              ServeApplicationSchema(
                  import_path="module.app",
                  deployments=[
                      DeploymentSchema(
                          name="deployment",
                          new_version_config_key="this config is from newer version"
                          " of Ray",
                      )
                  ],
                  new_version_config_key="this config is from newer version of Ray",
              ),
          ],
          new_version_config_key="this config is from newer version of Ray",
      )
  
imports: import pytest
  from ray import cloudpickle
  from ray._private.pydantic_compat import ValidationError
  from ray._private.utils import import_attr
  from ray.serve._private.config import DeploymentConfig, ReplicaConfig, _proto_to_dict
  from ray.serve._private.constants import DEFAULT_AUTOSCALING_POLICY, DEFAULT_GRPC_PORT
  from ray.serve._private.utils import DEFAULT
  from ray.serve.autoscaling_policy import default_autoscaling_policy
  from ray.serve.config import AutoscalingConfig, DeploymentMode, HTTPOptions, ProxyLocation, gRPCOptions
  from ray.serve.generated.serve_pb2 import AutoscalingConfig
  from ray.serve.generated.serve_pb2 import DeploymentConfig
  from ray.serve.generated.serve_pb2 import DeploymentLanguage
  from ray.serve.generated.serve_pb2_grpc import add_UserDefinedServiceServicer_to_server
  from ray.serve.schema import DeploymentSchema, HTTPOptionsSchema, ServeApplicationSchema, ServeDeploySchema
label_desc: Use image node_id 3 for calling a global function with example usage: test_config_schemas_forward_compatible() without return types