code: def setUpClass(cls):
      super().setUpClass()
      # Mock Kubric inside the test.
      cm = kb.sunds.mock_render(num_frames=1)
      cm.__enter__()
      # IMPORTANT: If the contextmanager is not bound. The Python never execute
      # it. So we have to set `cls._kubric_render_cm = cm` even if it is never
      # used.
      cls._kubric_render_cm = cm
  
file_path: kubric/kubric/sunds/kubric_builder_test.py
imports: from __future__ import annotations
  import tempfile
  import kubric
  import kubric.renderer.blender
  import kubric.sunds
  import tensorflow_datasets
label_desc: Use image node_id 1 for calling the KubricBuilderTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types