registered.
     * **prepend** (*bool*) -- If true, the provided "hook" will
       be fired before all existing "backward_pre" hooks on this
       "torch.nn.modules.Module". Otherwise, the provided "hook"
       will be fired after all existing "backward_pre" hooks on
       this "torch.nn.modules.Module". Note that global
       "backward_pre" hooks registered with
       "register_module_full_backward_pre_hook()" will fire before
       all hooks registered by this method.

  Returns:
     a handle that can be used to remove the added hook by calling
     "handle.remove()"

  Return type:
     "torch.utils.hooks.RemovableHandle"

register_load_state_dict_post_hook(hook)
  Registers a post hook to be run after module's "load_state_dict"
  is called.

  It should have the following signature::
     hook(module, incompatible_keys) -> None

  The "module" argument is the current module that this hook is
