code: def update(self, **kwargs):
          
          # Update inherited configurations
          super(CommonConf, self).update(**kwargs)
          conf_changed = False
  
          # Validate given configurations and check if value changed
          for conf_name, conf_value in kwargs.items():
              rtconf.base.get_validator(conf_name)(conf_value)
              item1 = self._settings.get(conf_name, None)
              item2 = kwargs.get(conf_name, None)
  
              if item1 != item2:
                  conf_changed = True
  
          # If any configuration changed, we update configuration value and
          # notify listeners
          if conf_changed:
              for conf_name, conf_value in kwargs.items():
                  # Since all new values are already validated, we can use them
                  self._settings[conf_name] = conf_value
  
              self._notify_listeners(CommonConf.CONF_CHANGED_EVT, self)
docs: Updates global configuration settings with given values.
  
          First checks if given configuration values differ from current values.
          If any of the configuration values changed, generates a change event.
          Currently we generate change event for any configuration change.
          Note: This method is idempotent.