code: def lr(self):
      return self._optimizer._get_hyper("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 15 for calling the AveragedOptimizerWrapper obj's underlying member method code with example usage: obj.lr() and returns: self