code: def test_state(self):
      model = self.model
      fields = model.__proxy__.list_fields()
      self.assertTrue("model" in fields)
      self.assertTrue("num_styles" in fields)
      self.assertTrue("_training_time_as_string" in fields)
      self.assertTrue("training_epochs" in fields)
      self.assertTrue("training_iterations" in fields)
      self.assertTrue("num_content_images" in fields)
      self.assertTrue("training_loss" in fields)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import pytest
  from .None import util
  import turicreate
  import tempfile
  import numpy
  import platform
  import sys
  import os
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _raise_error_if_not_sframe, _mac_ver
label_desc: Use image node_id 25 for calling the StyleTransferTest obj's underlying member method code with example usage: obj.test_state() without return types