old_contents: """SI_V22_02 model."""
  
  from .accelerator import default_cavity_on
  from .accelerator import default_radiation_on
  from .accelerator import default_vchamber_on
  from .accelerator import accelerator_data
  from .accelerator import create_accelerator
  
  from .lattice import set_rf_frequency
  from .families import family_mapping
  from .families import get_family_data
  from .families import get_girder_data
  from .families import get_section_name_mapping
  
  from .lattice import energy
  from .lattice import harmonic_number
  from .lattice import default_optics_mode, lattice_symmetry
  
  lattice_version = accelerator_data['lattice_version']
  
new_contents: """SI_V24_04 model."""
  
  from .accelerator import default_cavity_on
  from .accelerator import default_radiation_on
  from .accelerator import default_vchamber_on
  from .accelerator import accelerator_data
  from .accelerator import create_accelerator
  
  from .lattice import set_rf_frequency
  from .families import family_mapping
  from .families import get_family_data
  from .families import get_girder_data
  from .families import get_section_name_mapping
  
  from .lattice import energy
  from .lattice import harmonic_number
  from .lattice import default_optics_mode, lattice_symmetry
  
  lattice_version = accelerator_data['lattice_version']
  
subject: Correct comment of version in __init__