code: def uses_retain_variables(
      info: Optional[DifferentiabilityInfo],
  ) -> bool:
      return uses_ident(info, "retain_variables")
  
imports: import re
  from dataclasses import dataclass
  from typing import cast, Dict, List, Match, Optional, Sequence, Set, Tuple
  from torchgen import local
  from torchgen.api import cpp
  from torchgen.api.types import BaseCType, Binding, NamedCType, tensorListT
  from torchgen.model import BaseTy, BaseType, FunctionSchema, ListType, NativeFunction, NativeFunctionsViewGroup, SchemaKind, Type
  from torchgen.utils import IDENT_REGEX
label_desc: Use image node_id 2 for calling a global function with example usage: uses_retain_variables(info) and returns: uses_ident