// shared name of the variable if a variable is saved successfully. If the
// variable is not saved, returns an empty string.
absl::StatusOr<std::string> AddTensorToBundleWriter(
    mlir::TF::AssignVariableOp assign_var_op, BundleWriter& bundle_writer) {
  auto resource_operand = assign_var_op.getOperand(0);
  auto var_handle_op =
      llvm::dyn_cast<mlir::TF::VarHandleOp>(resource_operand.getDefiningOp());
  if (!var_handle_op) {