code: def test_synthesis_with_single_image(self):
      image = self.train[0][self.feature]
      data = tc.one_shot_object_detector.util.preview_synthetic_training_data(
          image, "custom_logo", backgrounds=self.backgrounds
      )
  
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 pytest
  import sys
  import os
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._internal_utils import _raise_error_if_not_sarray, _mac_ver
label_desc: Use image node_id 2 for calling the OneObjectDetectorSmokeTest obj's underlying member method code with example usage: obj.test_synthesis_with_single_image() without return types