old_contents: from .lammps_wrapper import LammpsWrapper
  from .cuba_extension import CUBAExtension
  
  
  __all__ = ["LammpsWrapper", "CUBAExtension"]
  
new_contents: from .lammps_wrapper import LammpsWrapper, InterfaceType
  from .cuba_extension import CUBAExtension
  
  
  __all__ = ["LammpsWrapper", "InterfaceType", "CUBAExtension"]
  
subject: allow InterfaceType to be imported