class_docstr: Tests for LAION-400M image dataset.
code: def setUpClass(cls):
      laion400m.LAION400M_EMBEDDINGS_CONFIG.num_shards = 1
      super().setUpClass()
  
file_path: datasets/tensorflow_datasets/vision_language/laion400m/laion400m_test.py
imports: import tensorflow_datasets.public_api
  from tensorflow_datasets.vision_language.laion400m import laion400m
label_desc: Use image node_id 1 for calling the Laion400MEmbeddingsTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types