Decorators in MobX

decorators.js

import { decorate, observable, flow } from "mobx"

/**
 with decorator syntax enabled
*/
class City {
    @observable location
    @observable temperature

    @action.bound
    fetchTemperature () {
        /* implementation */
    }
}

/**
 without decorator syntax enabled
*/
class City {
    location
    temperature

    fetchTemperature () {
        /* implementation */
    }
}
decorate(City, {
    location: observable,
    temperature: observable,
    fetchTemperature: action.bound
})

missing action in the import? thanks otherwise!