code: def test_sequential_to_model(self):
      seq = Sequential()
      seq.add(
          Dense(
              8,
              input_shape=(
                  32,
                  32,
              ),
          )
      )
      seq.add(Flatten())
      seq.add(Dense(4, activation="softmax"))
      seq.to_model()
  
imports: import pytest
  import shutil
  from zoo.feature.common import ChainedPreprocessing
  from zoo.feature.image import *
  from zoo.pipeline.api.keras.layers import *
  from zoo.pipeline.api.keras.models import *
  from test.zoo.pipeline.utils.test_utils import ZooTestCase
label_desc: Use image node_id 8 for calling the TestSimpleIntegration obj's underlying member method code with example usage: obj.test_sequential_to_model() without return types