code: def __len__(self) -> int:
      return len(self.indexables[0]) // self.batch_size
  
file_path: alibi-detect/alibi_detect/utils/tensorflow/data.py
imports: import numpy
  import tensorflow
  from typing import Tuple, Union
label_desc: Use image node_id 3 for calling the TFDataset obj's underlying member method code with example usage: obj.__len__() and returns: unknown