code: def _get_subclass_list_for_enums(self, classname, namespace):
          
          if self._repo_lite:
              return NocaseDict({classname: classname})
          if not self._class_exists(classname, namespace):
              raise CIMError(
                  CIM_ERR_INVALID_CLASS,
                  _format("Class {0!A} not found in namespace {1!A}.",
                          classname, namespace))
  
          if not self.classes:
              return NocaseDict()
  
          clnslist = self._get_subclass_names(classname, namespace, True)
          clnsdict = NocaseDict()
          for cln in clnslist:
              clnsdict[cln] = cln
  
          clnsdict[classname] = classname
          return clnsdict
docs: Get class list (i.e names of subclasses for classname for the
              enumerateinstance methods. If conn.lite returns only classname but
              no subclasses.
  
              Returns NocaseDict where only the keys are important, This allows
              case insensitive matches of the names with Python "for cln in clns".