code: def setUpClass(cls):
      super(Pg19Test, cls).setUpClass()
      pg19_dataset_builder._DATA_DIR = os.path.normpath(
          os.path.dirname(__file__) + "/dummy_data"
      )
  
imports: import os
  from tensorflow_datasets.datasets.pg19 import pg19_dataset_builder
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling the Pg19Test obj's underlying member method code with example usage: obj.setUpClass(cls) without return types