code: def setUpClass(self):
      self.model_dir = tempfile.mkdtemp()
  
imports: import os, shutil
  import numpy
  import coremltools.models.datatypes
  import unittest
  import pytest
  import tempfile
  from coremltools.models.utils import save_spec
  from coremltools.models import MLModel
  from coremltools.models.neural_network import NeuralNetworkBuilder, AdamParams, SgdParams
  from coremltools.models.pipeline import PipelineRegressor, PipelineClassifier
label_desc: Use image node_id 1 for calling the MLModelUpdatableTest obj's underlying member method code with example usage: obj.setUpClass() without return types