// mutable variables and produce ReadVariable/AssignVariable ops in TFLite.
  bool enable_tflite_variables = false;
  // Whether to disable the variable freezing pass or not.
  // By default we freeze all variables and disallow mutable variables. When
  // 'enable_tflite_variables' is true then we allow mutable variable only.
  bool disable_variable_freezing = false;

  mlir::TFL::PassConfig pass_config(quant_specs);
  bool emit_builtin_tflite_ops = !toco_flags.force_select_tf_ops();
  pass_config.emit_builtin_tflite_ops = emit_builtin_tflite_ops;
  pass_config.enable_tflite_variables =
      toco_flags.enable_tflite_resource_variables();
  pass_config.unfold_batch_matmul = toco_flags.unfold_batchmatmul();
  pass_config.lower_tensor_list_ops = toco_flags.lower_tensor_list_ops();

  }

  mlir::TFL::PassConfig pass_config(quant_specs);
  bool emit_builtin_tflite_ops = !toco_flags.force_select_tf_ops();
  pass_config.emit_builtin_tflite_ops = emit_builtin_tflite_ops;
  pass_config.enable_tflite_variables =
      toco_flags.enable_tflite_resource_variables();
  pass_config.unfold_batch_matmul = toco_flags.unfold_batchmatmul();
  pass_config.lower_tensor_list_ops = toco_flags.lower_tensor_list_ops();

    // This pass 'freezes' immutable global tensors and inlines them as tf
    // constant ops.
    pass_manager->addPass(mlir::tf_saved_model::CreateFreezeGlobalTensorsPass(
        /*allow_mutable_tensors=*/pass_config.enable_tflite_variables));
  }

  if (!saved_model_dir.empty()) {
    // This pass 'freezes' tf saved model asset ops and inlines as string values
    // in a format of the tf constant op.
    pass_manager->addPass(