code: def setup_registry(
      registry_name: str, base_class=None, default=None, required=False
  ):
      assert registry_name.startswith("--")
      registry_name = registry_name[2:].replace("-", "_")
  
      REGISTRY = {}
      REGISTRY_CLASS_NAMES = set()
      DATACLASS_REGISTRY = {}
  
      # maintain a registry of all registries
      if registry_name in REGISTRIES:
          return  # registry already exists
      REGISTRIES[registry_name] = {
          "registry": REGISTRY,
          "default": default,
          "dataclass_registry": DATACLASS_REGISTRY,
      }
  
      def build_x(
          cfg: Union[DictConfig, str, Namespace],
          *extra_args,
          **extra_kwargs,
      ):
          if isinstance(cfg, DictConfig):
              choice = cfg._name
  
              if choice and choice in DATACLASS_REGISTRY:
                  from_checkpoint = extra_kwargs.get(
                      "from_checkpoint", False
                  )
                  dc = DATACLASS_REGISTRY[choice]
                  cfg = merge_with_parent(
                      dc(), cfg, remove_missing=from_checkpoint
                  )
          elif isinstance(cfg, str):
              choice = cfg
              if choice in DATACLASS_REGISTRY:
                  cfg = DATACLASS_REGISTRY[choice]()
          else:
              choice = getattr(cfg, registry_name, None)
              if choice in DATACLASS_REGISTRY:
                  cfg = DATACLASS_REGISTRY[choice].from_namespace(cfg)
  
          if choice is None:
              if required:
                  raise ValueError(
                      "{} is required!".format(registry_name)
                  )
              return None
  
          cls = REGISTRY[choice]
          if hasattr(cls, "build_" + registry_name):
              builder = getattr(cls, "build_" + registry_name)
          else:
              builder = cls
  
          if "from_checkpoint" in extra_kwargs:
              del extra_kwargs["from_checkpoint"]
  
          return builder(cfg, *extra_args, **extra_kwargs)
  
      def register_x(name, dataclass=None):
          def register_x_cls(cls):
              if name in REGISTRY:
                  raise ValueError(
                      "Cannot register duplicate {} ({})".format(
                          registry_name, name
                      )
                  )
              if cls.__name__ in REGISTRY_CLASS_NAMES:
                  raise ValueError(
                      "Cannot register {} with duplicate class name ({})".format(
                          registry_name, cls.__name__
                      )
                  )
              if base_class is not None and not issubclass(
                  cls, base_class
              ):
                  raise ValueError(
                      "{} must extend {}".format(
                          cls.__name__, base_class.__name__
                      )
                  )
  
              if dataclass is not None and not issubclass(
                  dataclass, FairseqDataclass
              ):
                  raise ValueError(
                      "Dataclass {} must extend FairseqDataclass".format(
                          dataclass
                      )
                  )
  
              cls.__dataclass = dataclass
              if cls.__dataclass is not None:
                  DATACLASS_REGISTRY[name] = cls.__dataclass
  
                  cs = ConfigStore.instance()
                  node = dataclass()
                  node._name = name
                  cs.store(
                      name=name,
                      group=registry_name,
                      node=node,
                      provider="fairseq",
                  )
  
              REGISTRY[name] = cls
  
              return cls
  
          return register_x_cls
  
      return build_x, register_x, REGISTRY, DATACLASS_REGISTRY
  
imports: from argparse import Namespace
  from typing import Union
  from fairseq.dataclass import FairseqDataclass
  from fairseq.dataclass.utils import merge_with_parent
  from hydra.core.config_store import ConfigStore
  from omegaconf import DictConfig
label_desc: Use image node_id 1 for calling a global function with example usage: setup_registry(registry_name, base_class, default, required) and returns: build_x,  register_x,  REGISTRY,  DATACLASS_REGISTRY, builder, register_x_cls, None, cls