code: def learning_rate(self, learning_rate):
      self._optimizer._set_hyper("learning_rate", learning_rate)
  
imports: import abc
  import warnings
  import tensorflow
  from tensorflow_addons.optimizers import KerasLegacyOptimizer
  from tensorflow_addons.utils import types
  from typeguard import typechecked
label_desc: Use image node_id 18 for calling the AveragedOptimizerWrapper obj's underlying member method code with example usage: obj.learning_rate(learning_rate) without return types