code: def test_churn_predictor(self):
      # Arrange
      time = [1453845953 + 20000 * x for x in range(500)]
      user = [1, 2, 3, 4, 5] * 20 + [1, 2, 3, 4] * 25 + [1, 2, 3] * 100
      actions = turicreate.SFrame(
          {
              "user_id": user,
              "timestamp": time,
              "action": [1, 2, 3, 4, 5] * 100,
          }
      )
  
      def _unix_timestamp_to_datetime(x):
          import datetime
  
          return datetime.datetime.fromtimestamp(x)
  
      actions["timestamp"] = actions["timestamp"].apply(
          _unix_timestamp_to_datetime
      )
      actions = turicreate.TimeSeries(actions, "timestamp")
  
      # Act
      m = turicreate.churn_predictor.create(actions)
      actual = [x for x in dir(m) if not x.startswith("_")]
  
      # Assert.
      expected = [
          "categorical_features",
          "evaluate",
          "extract_features",
          "get_feature_importance",
          "churn_period",
          "grace_period",
          "features",
          "get",
          "is_data_aggregated",
          "_list_fields",
          "_list_fields",
          "lookback_periods",
          "model_options",
          "name",
          "num_features",
          "num_observations",
          "num_users",
          "numerical_features",
          "predict",
          "explain",
          "processed_training_data",
          "save",
          "show",
          "summary",
          "time_boundaries",
          "time_period",
          "trained_model",
          "trained_explanation_model",
          "get_churn_report",
          "get_activity_baseline",
          "views",
          "use_advanced_features",
          "user_id",
      ]
      check_visible_modules(actual, expected)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import turicreate
label_desc: Use image node_id 3 for calling the TabCompleteVisibilityTests obj's underlying member method code with example usage: obj.test_churn_predictor() and returns: datetime