text: # Copyright 2017 The TensorFlow Authors. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  """Experimental utilities re:tf.estimator.*."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  # pylint: disable=unused-import,line-too-long,wildcard-import
  from tensorflow.contrib.estimator.python.estimator.boosted_trees import *
  from tensorflow.contrib.estimator.python.estimator.dnn import *
  from tensorflow.contrib.estimator.python.estimator.dnn_linear_combined import *
  from tensorflow.contrib.estimator.python.estimator.extenders import *
  from tensorflow.contrib.estimator.python.estimator.head import *
  from tensorflow.contrib.estimator.python.estimator.linear import *
  from tensorflow.contrib.estimator.python.estimator.logit_fns import *
  from tensorflow.contrib.estimator.python.estimator.multi_head import *
  from tensorflow.contrib.estimator.python.estimator.replicate_model_fn import *
  
  from tensorflow.python.util.all_util import remove_undocumented
  # pylint: enable=unused-import,line-too-long,wildcard-import
  
  _allowed_symbols = [
      'add_metrics',
      'binary_classification_head',
      'clip_gradients_by_norm',
      'forward_features',
      'multi_class_head',
      'multi_head',
      'multi_label_head',
      'poisson_regression_head',
      'regression_head',
      'DNNEstimator',
      'DNNLinearCombinedEstimator',
      'LinearEstimator',
      'boosted_trees_classifier_train_in_memory',
      'boosted_trees_regressor_train_in_memory',
      'call_logit_fn',
      'dnn_logit_fn_builder',
      'linear_logit_fn_builder',
      'replicate_model_fn',
      'TowerOptimizer',
  ]
  
  remove_undocumented(__name__, allowed_exception_list=_allowed_symbols)
  