docstr: teardown any state that was previously setup with a setup_method
  call.
docstr_tok: ["teardown","any","state","that","was","previously","setup","with","a","setup_method","call","."]
code: def teardown_method(self, method):
      """teardown any state that was previously setup with a setup_method
      call.
      """
      self.sc.stop()
  
imports: import errno
  import shutil
  import pytest
  from bigdl.nn.criterion import *
  from bigdl.nn.layer import *
  from bigdl.optim.optimizer import *
  from numpy.testing import assert_allclose
  from pyspark.ml import Pipeline, PipelineModel
  from pyspark.ml.feature import MinMaxScaler
  from pyspark.ml.tuning import ParamGridBuilder
  from pyspark.sql.types import *
  from zoo.common.nncontext import *
  from zoo.feature.common import *
  from zoo.feature.image import *
  from zoo.pipeline.api.keras import layers
  from zoo.pipeline.api.keras.models import Model
  from zoo.pipeline.api.keras.optimizers import Adam
  from zoo.pipeline.nnframes import *
  from zoo.util.tf import *
label_desc: Use image node_id 2 for calling the TestNNClassifer obj's underlying member method code with example usage: obj.teardown_method(method) without return types