code: def test_load_image_data_grey_scale():
      io_utils.image_dataset_from_directory(
          IMG_DATA_DIR, image_size=(180, 180), color_mode="grayscale"
      )
  
file_path: autokeras/autokeras/utils/io_utils_test.py
imports: import os
  import shutil
  import pytest
  import tensorflow
  from tensorflow import keras
  from autokeras import test_utils
  from autokeras.utils import io_utils
label_desc: Use image node_id 6 for calling a global function with example usage: test_load_image_data_grey_scale() without return types