old_contents: from .criterion import *
  from .classifier import *
  from .data_set import *
  from .data import *
  from .debug import *
  from .estimator import *
  from .experiment import *
  from .layer import *
  from .monitored_estimator import *
  from .network_model import *
  from .tf_extra import *
  from .trainer import *
  
new_contents: from .criterion import *
  from .classifier import *
  from .data_set import *
  from .data import *
  from .debug import *
  from .estimator import *
  from .experiment import *
  from .layer import *
  from .monitored_estimator import *
  from .network_model import *
  from .tf_extra import *
  from .trainer import *
  from .projection import *
  
subject: Add projection module to __init__.py