code: def get_classes_names(self, update=False):
          
          if self.classes_names is None or update:
              self.classes_names = [i.get_name() for i in self.get_classes()]
          return self.classes_names
docs: Return the names of classes
  
          :param update: True indicates to recompute the list.
                         Maybe needed after using a MyClass.set_name().
          :rtype: a list of string