old_contents: """
  Gathers all models in one place for convenient imports
  """
  from __future__ import division
  from __future__ import unicode_literals
  
  from deepchem.models.models import Model
  from deepchem.models.sklearn_models import SklearnModel
  from deepchem.models.xgboost_models import XGBoostModel
  from deepchem.models.multitask import SingletaskToMultitask
  
  from deepchem.models.tensorgraph.tensor_graph import TensorGraph
  from deepchem.models.tensorgraph.fcnet import MultiTaskRegressor
  from deepchem.models.tensorgraph.fcnet import MultiTaskClassifier
  from deepchem.models.tensorgraph.fcnet import MultiTaskFitTransformRegressor
  from deepchem.models.tensorgraph.IRV import TensorflowMultiTaskIRVClassifier
  from deepchem.models.tensorgraph.robust_multitask import RobustMultitaskClassifier
  from deepchem.models.tensorgraph.robust_multitask import RobustMultitaskRegressor
  from deepchem.models.tensorgraph.progressive_multitask import ProgressiveMultitaskRegressor
  from deepchem.models.tensorgraph.models.graph_models import WeaveModel, DTNNTensorGraph, DAGTensorGraph, GraphConvModel, MPNNTensorGraph
  from deepchem.models.tensorgraph.models.symmetry_function_regression import BPSymmetryFunctionRegression, ANIRegression
  
  from deepchem.models.tensorgraph.models.seqtoseq import SeqToSeq
  from deepchem.models.tensorgraph.models.gan import GAN, WGAN
  from deepchem.models.tensorgraph.models.text_cnn import TextCNNTensorGraph
  from deepchem.models.tensorgraph.sequential import Sequential
  from deepchem.models.tensorgraph.models.sequence_dnn import SequenceDNN
  
  #################### Compatibility imports for renamed TensorGraph models. Remove below with DeepChem 3.0. ####################
  
  from deepchem.models.tensorgraph.models.graph_models import WeaveTensorGraph, GraphConvTensorGraph
new_contents: """
  Gathers all models in one place for convenient imports
  """
  from __future__ import division
  from __future__ import unicode_literals
  
  from deepchem.models.models import Model
  from deepchem.models.sklearn_models import SklearnModel
  from deepchem.models.xgboost_models import XGBoostModel
  from deepchem.models.multitask import SingletaskToMultitask
  
  from deepchem.models.tensorgraph.tensor_graph import TensorGraph
  from deepchem.models.tensorgraph.fcnet import MultiTaskRegressor
  from deepchem.models.tensorgraph.fcnet import MultiTaskClassifier
  from deepchem.models.tensorgraph.fcnet import MultiTaskFitTransformRegressor
  from deepchem.models.tensorgraph.IRV import TensorflowMultiTaskIRVClassifier
  from deepchem.models.tensorgraph.robust_multitask import RobustMultitaskClassifier
  from deepchem.models.tensorgraph.robust_multitask import RobustMultitaskRegressor
  from deepchem.models.tensorgraph.progressive_multitask import ProgressiveMultitaskRegressor, ProgressiveMultitaskClassifier
  from deepchem.models.tensorgraph.models.graph_models import WeaveModel, DTNNTensorGraph, DAGTensorGraph, GraphConvModel, MPNNTensorGraph
  from deepchem.models.tensorgraph.models.symmetry_function_regression import BPSymmetryFunctionRegression, ANIRegression
  
  from deepchem.models.tensorgraph.models.seqtoseq import SeqToSeq
  from deepchem.models.tensorgraph.models.gan import GAN, WGAN
  from deepchem.models.tensorgraph.models.text_cnn import TextCNNTensorGraph
  from deepchem.models.tensorgraph.sequential import Sequential
  from deepchem.models.tensorgraph.models.sequence_dnn import SequenceDNN
  
  #################### Compatibility imports for renamed TensorGraph models. Remove below with DeepChem 3.0. ####################
  
  from deepchem.models.tensorgraph.models.graph_models import WeaveTensorGraph, GraphConvTensorGraph
subject: Add accidentally removed ProgressiveMultitaskClassifier