def apply_filters(self, filters):
        """
        It applies a specified filters. The filters are used to reduce the control groups
        which are accessed by get_confgs, get_stats, and get_defaults methods.
        """
        _configs = self.configs
        _stats = self.stats
        self.configs = {}
        self.stats = {}
        for f in filters:
            if f in _configs:
                self.configs[f] = _configs[f]
            elif f in _stats:
                self.stats[f] = _stats[f]
            else:
                raise NoSuchControlFileError("%s for %s" % (f, self.subsystem.name))
It applies a specified filters. The filters are used to reduce the control groups
        which are accessed by get_confgs, get_stats, and get_defaults methods.