old_contents: from eemeter.modeling.models.seasonal import SeasonalElasticNetCVModel
  
  __all__ = ['SeasonalElasticNetCVModel', ]
  
new_contents: from eemeter.modeling.models.seasonal import SeasonalElasticNetCVModel
  from eemeter.modeling.models.billing import BillingElasticNetCVModel
  
  __all__ = (
      'SeasonalElasticNetCVModel',
      'BillingElasticNetCVModel',
  )
  
subject: Add shortcut to model