code: def testConvertFields(self):
      fields = [
          extension_type_field.ExtensionTypeField("x", int),
          extension_type_field.ExtensionTypeField(
              "y", typing.Tuple[typing.Union[int, bool], ...]
          ),
          extension_type_field.ExtensionTypeField(
              "y", _TUPLE[typing.Union[int, bool], ...]
          ),
          extension_type_field.ExtensionTypeField("z", tensor.Tensor),
      ]
      field_values = {
          "x": 1,
          "y": [1, True, 3],
          "z": [[1, 2], [3, 4], [5, 6]],
      }
      extension_type_field.convert_fields(fields, field_values)
      self.assertEqual(set(field_values), set(["x", "y", "z"]))
      self.assertEqual(field_values["x"], 1)
      self.assertEqual(field_values["y"], (1, True, 3))
      self.assertIsInstance(field_values["z"], tensor.Tensor)
      self.assertAllEqual(field_values["z"], [[1, 2], [3, 4], [5, 6]])
  
imports: import sys
  import typing
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import extension_type_field
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 5 for calling the FieldValueConverterTest obj's underlying member method code with example usage: obj.testConvertFields() without return types