code: def from_native_function(
      f: NativeFunction, *, method: bool, fallback_binding: bool = False
  ) -> "CppSignatureGroup":
      func = f.func
  
      def make_sig(*, faithful: bool, symint: bool) -> CppSignature:
          return CppSignature(
              func=func,
              faithful=faithful,
              symint=symint,
              method=method,
              fallback_binding=fallback_binding,
              cpp_no_default_args=f.cpp_no_default_args,
          )
  
      def make_sigs(
          *, symint: bool
      ) -> Tuple[CppSignature, Optional[CppSignature]]:
          faithful_signature: Optional[CppSignature] = None
          if (
              func.arguments.tensor_options is not None
              or len(func.arguments.out) > 0
          ):
              faithful_signature = make_sig(
                  faithful=True, symint=symint
              )
          signature = make_sig(faithful=False, symint=symint)
          return signature, faithful_signature
  
      signature, faithful_signature = make_sigs(symint=False)
      symint_signature: Optional[CppSignature] = None
      symint_faithful_signature: Optional[CppSignature] = None
      if func.has_symint():
          symint_signature, symint_faithful_signature = make_sigs(
              symint=True
          )
  
      return CppSignatureGroup(
          func=func,
          signature=signature,
          faithful_signature=faithful_signature,
          symint_signature=symint_signature,
          symint_faithful_signature=symint_faithful_signature,
      )
  
imports: from dataclasses import dataclass
  from typing import Iterator, List, Optional, Sequence, Set, Tuple, Union
  from torchgen.model import BackendIndex, FunctionSchema, NativeFunction, NativeFunctionsGroup, NativeFunctionsViewGroup
  from .types_base import Binding, CType, Expr
  from torchgen.api import cpp, dispatcher, functionalization, native, structured, translate
label_desc: Use image node_id 3 for calling the CppSignatureGroup obj's underlying member method code with example usage: obj.from_native_function(f) and returns: CppSignatureGroup, CppSignature, signature,  faithful_signature