code: def get_example_iter():
      def ex_iter(unused_filename):
          examples = []
          for i in range(50):
              example = tf.train.Example()
              example.features.feature["num"].int64_list.value.append(i)
              examples.append(example.SerializeToString())
          return examples
  
      return ex_iter
  
imports: from facets_overview.feature_statistics_generator import FeatureStatisticsGenerator
  import numpy
  import tensorflow
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 20 for calling the FeatureStatisticsGeneratorTest obj's underlying member method code with example usage: obj.get_example_iter() and returns: ex_iter, examples