old_contents: # used for setup.py
  name = "ceviche"
  
  __version__ = '0.0.1'
  
  from .fdtd import fdtd
  from .fdfd import fdfd_ez, fdfd_hz, fdfd_ez_nl
  from .jacobians import jacobian
  
  from . import viz
  
new_contents: # used for setup.py
  name = "ceviche"
  
  __version__ = '0.0.1'
  
  from .fdtd import fdtd
  from .fdfd import fdfd_ez, fdfd_hz, fdfd_ez_nl
  from .jacobians import jacobian
  
  from . import viz
  from . import modes
  from . import utils
  
subject: Add modes and utils submodules