old_contents: from .regression import RegressionModel, RegressionModelGroup, \
      SegmentedRegressionModel
  from .lcm import MNLLocationChoiceModel, MNLLocationChoiceModelGroup, \
      SegmentedMNLLocationChoiceModel
  from .transition import (
      GrowthRateTransition, TabularGrowthRateTransition,
      TabularTotalsTransition, TransitionModel)
  from .relocation import RelocationModel
  
new_contents: from .regression import RegressionModel, RegressionModelGroup, \
      SegmentedRegressionModel
  from .dcm import MNLDiscreteChoiceModel, MNLDiscreteChoiceModelGroup, \
      SegmentedMNLDiscreteChoiceModel
  from .transition import (
      GrowthRateTransition, TabularGrowthRateTransition,
      TabularTotalsTransition, TransitionModel)
  from .relocation import RelocationModel
  
subject: update module/class names in models/__init__.py