old_contents: from .base import AAM, PatchBasedAAM
  from .builder import AAMBuilder, PatchBasedAAMBuilder
  from .fitter import LucasKanadeAAMFitter
  
new_contents: from .builder import (
      AAMBuilder, PatchAAMBuilder, LinearAAMBuilder,
      LinearPatchAAMBuilder, PartsAAMBuilder)
  from .fitter import LKAAMFitter
  from .algorithm import (
      PFC, PIC,
      SFC, SIC,
      AFC, AIC,
      MAFC, MAIC,
      WFC, WIC)
  from .result import SerializableAAMFitterResult
  
subject: Update aam.__init__.py