code: def deserialize_optimizer(*args, **kwargs):
      return optimizer.deserialize_tf_keras_optimizer(*args, **kwargs)
  
imports: import io
  from packaging import version
  import h5py
  import numpy
  import tensorflow
  from horovod.runner.common.util import codec
  from horovod.spark.common import constants, params
  from horovod.spark.keras import optimizer, remote
label_desc: Use image node_id 8 for calling the TFKerasUtil obj's underlying member method code with example usage: obj.deserialize_optimizer() and returns: optimizer