code: def backwards_debug_hook(grad):
      print(
          "Uh oh, main_params is receiving a gradient in the backward pass!"
      )
  
imports: import torch
  import torch.nn
  from torch._utils import _flatten_dense_tensors, _unflatten_dense_tensors
label_desc: Use image node_id 5 for calling a global function with example usage: backwards_debug_hook(grad) without return types