code: def on_epoch_end(self):
      np.random.shuffle(self._index)
  
file_path: AIX360/aix360/algorithms/nncontrastive/utils.py
imports: import math
  import numpy
  from tensorflow.keras.utils import Sequence
  from sklearn.model_selection import StratifiedShuffleSplit
label_desc: Use image node_id 2 for calling the AESampler obj's underlying member method code with example usage: obj.on_epoch_end() without return types