code: def add_variable(
      self,
      shape,
      initializer="zeros",
      dtype=None,
      name=None,
  ):
      self._check_super_called()
      initializer = initializers.get(initializer)
      with backend.name_scope(self.name, caller=self):
          variable = backend.Variable(
              initializer=initializer,
              shape=shape,
              dtype=dtype,
              trainable=False,
              name=name,
          )
      self._track_variable(variable)
      return variable
  
imports: import re
  import warnings
  import numpy
  from keras import backend
  from keras import initializers
  from keras import ops
  from keras.optimizers.schedules import learning_rate_schedule
  from keras.saving import serialization_lib
  from keras.utils import tracking
  from keras.utils.naming import auto_name
label_desc: Use image node_id 7 for calling the BaseOptimizer obj's underlying member method code with example usage: obj.add_variable(shape, initializer, dtype, name) and returns: variable