code: def _update(self, grouped_grads: _GroupedGradsType, **kwargs) -> None:
      pass
  
imports: import abc
  import collections
  import copy
  import math
  import typing
  import warnings
  import torch
  from .None import patch
  from .None import utils
label_desc: Use image node_id 4 for calling the DifferentiableOptimizer obj's underlying member method code with example usage: obj._update(grouped_grads) without return types