code: def __new__(cls):
      if cls._instance is None:
          cls._instance = object.__new__(cls)
  
      return cls._instance
  
imports: import dataclasses
  import inspect
  from types import SimpleNamespace
  from typing import TYPE_CHECKING, cast, Any, Callable, ClassVar, Generic, TypeVar
  from gluonts.itertools import select
  from gluonts.pydantic import pydantic, dataclass
label_desc: Use image node_id 1 for calling the _EventualType obj's underlying member method code with example usage: obj.__new__(cls) and returns: cls