class_docstr: A simple hook grouping a model and a `ModelHook`, which provides easy APIs for to call the init method of the hook
  or remove it entirely.
code: def offload(self):
      self.hook.init_hook(self.model)
  
imports: import functools
  from typing import Dict, List, Mapping, Optional, Union
  import torch
  import torch.nn
  from .state import PartialState
  from .utils import PrefixedDataset, find_device, named_module_tensors, send_to_device, set_module_tensor_to_device
  from .utils.modeling import get_non_persistent_buffers
label_desc: Use image node_id 2 for calling the UserCpuOffloadHook obj's underlying member method code with example usage: obj.offload() without return types