code: def setUp(self):
      self.fs = FeatureStatisticsGenerator()
  
imports: from feature_statistics_generator import FeatureStatisticsGenerator
  import numpy
  import tensorflow
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 1 for calling the FeatureStatisticsGeneratorTest obj's underlying member method code with example usage: obj.setUp() without return types