按照官网的例子是试了一下，发现效果和介绍的根本不一样
const mapState = (state) => ({
loading: state.loading.effects.login.submit, // true when the `login/submit` effect is running
// or
loading: state.loading.models.login, // true when ANY effect on the `login` model is running
})
state.loading.effects是一个空对象，还请指点一下