TF_RETURN_IF_ERROR(FunctionDefToBodyHelper(
      *then_branch_function_def, AttrSlice(&then_branch_func.attr()), fld,
      &then_branch_function_body));

  std::unique_ptr<FunctionBody> else_branch_function_body;
  TF_RETURN_IF_ERROR(FunctionDefToBodyHelper(
      *else_branch_function_def, AttrSlice(&else_branch_func.attr()), fld,
      &else_branch_function_body));

                          conversion_metadata.function_name);

    std::unique_ptr<FunctionBody> fbody;
    TF_RETURN_IF_ERROR(
        FunctionDefToBodyHelper(*func_def, AttrSlice(), &graph_flib_, &fbody));
    TF_RETURN_IF_ERROR(importer.PrepareConvert(*fbody->graph));

    TF_ASSIGN_OR_RETURN(auto func_type, importer.InferLibFunctionType(*fbody));