code: def preprocess_list(x: List[np.ndarray]) -> np.ndarray:
      return np.concatenate(x, axis=0)
  
file_path: alibi-detect/alibi_detect/cd/tensorflow/tests/test_lsdd_tf.py
imports: from functools import partial
  from itertools import product
  import numpy
  import pytest
  import tensorflow
  from tensorflow.keras.layers import Dense, Input, InputLayer
  from typing import Callable, List
  from alibi_detect.cd.tensorflow.lsdd import LSDDDriftTF
  from alibi_detect.cd.tensorflow.preprocess import HiddenOutput, UAE, preprocess_drift
label_desc: Use image node_id 2 for calling a global function with example usage: preprocess_list(x) and returns: np