Reload list of bundles from the store

        :return: self

def refresh(self):
        """
        Reload list of bundles from the store

        :return: self
        """
        self._bundles = {}

        bundles = self._api.get_bundles(self._document.id)
        for bundle in bundles:
            self._bundles[bundle['identifier']] = Bundle(self._api, self._document, bundle)
        
        return self