def update(self, **kwargs):
        """Custom update method to implement monitor parameter formatting."""
        if 'monitor' in kwargs:
            value = self._format_monitor_parameter(kwargs['monitor'])
            kwargs['monitor'] = value
        elif 'monitor' in self.__dict__:
            value = self._format_monitor_parameter(self.__dict__['monitor'])
            self.__dict__['monitor'] = value
        return super(Pool, self)._update(**kwargs)
Custom update method to implement monitor parameter formatting.