code: def signature_str_pyi_vararg(
      self, *, skip_outputs: bool = False
  ) -> Optional[str]:
      # the codegen doesn't include vararg variants for deprecated signatures
      return None
  
imports: from dataclasses import dataclass
  from typing import Dict, List, Optional, Sequence, Set, Tuple, Union
  from torchgen.api import cpp
  from torchgen.api.types import Binding, CppSignature, CppSignatureGroup
  from torchgen.gen import pythonify_default
  from torchgen.model import Argument, BaseTy, BaseType, FunctionSchema, ListType, NativeFunction, OptionalType, Return, Type, Variant
label_desc: Use image node_id 4 for calling the PythonSignatureDeprecated obj's underlying member method code with example usage: obj.signature_str_pyi_vararg() and returns: None