def set_settings(self, releases=None, default_release=None):
        """set path to storage"""
        if (self._storage is None or
                getattr(self, 'releases', {}) != releases or
                getattr(self, 'default_release', '') != default_release):
            self._storage = {}
            self.releases = releases or {}
            self.default_release = default_release
set path to storage