@classmethod
    def from_app(cls, app, environ, buffered=False):
        return cls(*_run_wsgi_app(app, environ, buffered))
register a listener function
dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/wrappers.py/BaseResponse.from_app--crossover with--dataset/ETHPy150Open CarterBain/Medici/ib/client/sync_wrapper.py/Observable.register