def set_store(store, key=_store_registry_key, app=None):
    app = app or webapp2.get_app()
    app.registry[key] = store
Sets an instance of :class:`I18nStore` in the app registry.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/webapp2-2.3/webapp2_extras/i18n.py/set_store