code: def testGetEntries_one(self):
      features, num_examples = self.fs._GetEntries(
          ["test"], 1, self.get_example_iter()
      )
      self.assertEqual(1, num_examples)
      self.assertTrue("num" in features)
  
imports: from feature_statistics_generator import FeatureStatisticsGenerator
  import numpy
  import tensorflow
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 21 for calling the FeatureStatisticsGeneratorTest obj's underlying member method code with example usage: obj.testGetEntries_one() without return types