class_docstr: Unit test class for testing scikit-learn converter.
docstr: Set up the unit test by loading common utilities.
docstr_tok: ["Set","up","the","unit","test","by","loading","common","utilities","."]
code: def setUpClass(self):
      """
      Set up the unit test by loading common utilities.
      """
  
imports: import unittest
  from coremltools._deps import _HAS_KERAS_TF
  from coremltools.proto import FeatureTypes_pb2
  import pytest
  import six
label_desc: Use image node_id 1 for calling the KerasSingleLayerTest obj's underlying member method code with example usage: obj.setUpClass() without return types