code: def test_nested_tuple(self):
      config_json = json.loads(
          """
                  {}
              """
      )
      config = config_from_json(TupleTestConfig, config_json)
      self.assertEqual(config.foo[0][0], 32)
      self.assertEqual(config.foo[1][1], 2)
  
imports: import json
  import unittest
  from typing import List, Tuple, Union
  from pytext.config.component import Component, ComponentType
  from pytext.config.pytext_config import ConfigBase
  from pytext.config.serialize import config_from_json, config_to_json, ConfigParseError, MissingValueError, UnionTypeError
label_desc: Use image node_id 3 for calling the TupleConfigTest obj's underlying member method code with example usage: obj.test_nested_tuple() without return types