docs: def in_casapy (helper, asdm=None, ms=None):
      """This function is run inside the weirdo casapy IPython environment! A
      strange set of modules is available, and the
      `pwkit.environments.casa.scripting` system sets up a very particular
      environment to allow encapsulated scripting.
  
      """
      if asdm is None:
          raise ValueError ('asdm')
      if ms is None:
          raise ValueError ('ms')
  
      helper.casans.importasdm (
          asdm = asdm,
          vis = ms,
          asis = 'Antenna Station Receiver Source CalAtmosphere CalWVR CorrelatorMode SBSummary',
          bdfflags = True,
          lazy = False,
          process_caldevice = False,
      )