code: def generateImplicitParameters(cls, obj):
          
          if not hasattr(obj, 'version'):
              obj.add(ContentLine('VERSION', [], cls.versionString))
docs: Create PRODID, VERSION, and VTIMEZONEs if needed.
  
          VTIMEZONEs will need to exist whenever TZID parameters exist or when
          datetimes with tzinfo exist.