class_docstr: _FakePalettizationTensorHook is the class to assist in using CPU when we only want to utilize a certain percentage
  of the GPU memory.
code: def debug_hook(self, x: _torch.Tensor):
      return x
  
file_path: coremltools/coremltools/optimize/torch/palettization/_fake_palettizer_tensor_hook.py
imports: import torch
  import torch.nn.functional
label_desc: Use image node_id 6 for calling the _FakePalettizationTensorHook obj's underlying member method code with example usage: obj.debug_hook(x) and returns: x