code: def _deactivate(self):
      for mod, fn, func in self._all_wrappers:
          utils.set_func(mod, fn, func)
      self._all_wrappers = []
  
imports: import contextlib
  import warnings
  import sys
  import torch
  from .None import utils
  from .opt import OptimWrapper
  from .scaler import LossScaler
  from ._amp_state import _amp_state, master_params, maybe_print
label_desc: Use image node_id 8 for calling the AmpHandle obj's underlying member method code with example usage: obj._deactivate() without return types