code: def data():
      return np.random.rand(1, 28, 28, 3)
  
file_path: keras-vis/tests/vis/visualization/test_saliency.py
imports: import pytest
  import numpy
  import keras.backend
  from keras.layers import Input, Dense, Flatten
  from keras.models import Model
  from vis.losses import ActivationMaximization
  from vis.visualization.saliency import visualize_saliency, visualize_saliency_with_losses
label_desc: Use image node_id 2 for calling a global function with example usage: data() and returns: np