related codes

class BaseStore {
    @observable statusTabActiveKey = 0
}

class ListStore extends BaseStore {
    @action.bound
    handleTabChange(index) {
        super.statusTabActiveKey = index
    }
}

const baseStore = new BaseStore()
const listStore = new ListStore()
export {
    baseStore,
    listStore,
}

what result do you expect? What is the error message actually seen?

I hope baseStore.statusTabActiveKey can modify