What we can achieve using AOP with ES7 Decorators

Invoice.ts

class Invoice {
    ...
    @beforeMethod(Validators.customValidate)
    @afterMethod(Serialize)
    @afterMethod(AsyncAdvices.postResult, 'url..')
    @afterMethod(triggerUpdates)
    doCheckout(shippingDetails){
        this.shippingDetails = shippingDetails
    }
    ...
}