code: def setup_method(self):
      super(TestSerializer, self).setup_method()
      self.postprocessor = Serializer.from_params(Params({}))
  
imports: from typing import Iterator, List
  import torch
  import pytest
  import json
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.common import Params
  from allennlp.common.util import sanitize
  from allennlp.data.data_loaders import TensorDict
  from allennlp.evaluation import Serializer
  from allennlp.evaluation.serializers import SimpleSerializer
label_desc: Use image node_id 1 for calling the TestSerializer obj's underlying member method code with example usage: obj.setup_method() without return types