code: def setUp(self) -> None:
      self.serializer = _OnnxTestTextualSerializer()
      onnx.serialization.registry.register(self.serializer)
  
file_path: onnx/onnx/test/serialization_test.py
imports: import os
  import tempfile
  import unittest
  import onnx
label_desc: Use image node_id 1 for calling the TestRegistry obj's underlying member method code with example usage: obj.setUp() without return types