code: def setUpClass(cls):
      super().setUpClass()
      with open(IMAGE_METADATA_PATH, "r") as f:
          cls.metadata = json.load(f)
  
imports: import json
  import random
  import unittest
  from augly import image
  from augly.tests.image_tests.base_unit_test import BaseImageUnitTest
  from augly.utils import EMOJI_PATH, IMAGE_METADATA_PATH, IMG_MASK_PATH
  from PIL import Image
label_desc: Use image node_id 1 for calling the TransformsImageUnitTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types