def update_cache(self):
        """Reset the lal cache. This can be used to update the cache if the
        result may change due to more files being added to the filesystem,
        for example.
        """
        cache = locations_to_cache(self.frame_src, latest=True)
        stream = lalframe.FrStreamCacheOpen(cache)
        self.stream = stream
Reset the lal cache. This can be used to update the cache if the
        result may change due to more files being added to the filesystem,
        for example.