torch.nn.modules.module.register_module_backward_hook
torch.nn.modules.module.register_module_backward_hook(hook)
Registers a backward hook common to all the modules.
This function is deprecated in favor of
   "torch.nn.modules.module.register_module_full_backward_hook()" and
   the behavior of this function will change in future versions.
Returns:
      a handle that can be used to remove the added hook by calling
      "handle.remove()"
Return type:
      "torch.utils.hooks.RemovableHandle"