code: def _parameter_add(
      params_1: Tuple[Tensor, ...], params_2: Tuple[Tensor, ...]
  ) -> Tuple[Tensor, ...]:
      """
      returns the sum of 2 tensors, represented as tuple of tensors.
      """
      return tuple(
          param_1 + param_2
          for (param_1, param_2) in zip(params_1, params_2)
      )
  
imports: import warnings
  from functools import reduce
  from typing import Any, Callable, Iterable, List, NamedTuple, Optional, Tuple, TYPE_CHECKING, Union
  import torch
  import torch.nn
  from captum._utils.common import _get_module_from_name, _parse_version
  from captum._utils.gradient import _compute_jacobian_wrt_params, _compute_jacobian_wrt_params_with_sample_wise_trick
  from captum._utils.progress import progress
  from torch import Tensor
  from torch.nn import Module
  from torch.utils.data import DataLoader, Dataset
label_desc: Use image node_id 21 for calling a global function with example usage: _parameter_add(params_1, params_2) and returns: tuple