code: def setup_class(cls):
      pass
  
imports: import unittest
  import numpy
  import coremltools
  from coremltools.models import datatypes, MLModel
  from coremltools.models.neural_network import NeuralNetworkBuilder
  from coremltools.models.neural_network.quantization_utils import _convert_array_to_nbit_quantized_bytes, quantize_weights
  from coremltools.models.utils import _macos_version, _is_macos
  from coremltools.converters.mil.backend.nn.op_mapping import to_py_type
label_desc: Use image node_id 1 for calling the ControlFlowCorrectnessTest obj's underlying member method code with example usage: obj.setup_class(cls) without return types