code: def setUpClass(cls):
      super(UtilModifyIntegerQuantizedModelIOTypeTest, cls).setUpClass()
      cls.post_train_int8_model = _generate_integer_tflite_model()
      cls.post_train_int16_model = _generate_integer_tflite_model(
          quantization_type=dtypes.int16
      )
  
imports: import os
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow.lite.python import util
  from tensorflow.lite.tools.flatbuffer_utils import read_model
  from tensorflow.python.client import session
  from tensorflow.python.framework import convert_to_constants
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import while_loop
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the UtilModifyIntegerQuantizedModelIOTypeTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types