code: def _maybe_mask(tensor: _torch.Tensor, mask: _torch.Tensor) -> None:
      if tensor.requires_grad:
          tensor.register_hook(_get_mask_closure(mask))
  
imports: import abc
  import collections
  import copy
  import math
  import typing
  import warnings
  import torch
  from .None import patch
  from .None import utils
label_desc: Use image node_id 2 for calling a global function with example usage: _maybe_mask(tensor, mask) without return types