code: def __init__(self, start_batch=1, stop_batch=None):
      self._callback = BenchmarkMetricsCallback(start_batch, stop_batch)
  
imports: import time
  import numpy
  import tensorflow
  from absl import flags
  import keras
label_desc: Use image node_id 1 to create a new TFKerasBenchmarkMetricsCallback object from inherited base classes: tf.keras.callbacks with example: obj = TFKerasBenchmarkMetricsCallback(start_batch, stop_batch)