Count not setup Ionic Deploy Service.Please help


i am using Ionic 2 and configured everything as per documentation but still i am not able to see latest changes on my app .

i am running below command its executing successfully and showing download successful message.

ionic upload --note “NOTE” --deploy dev

Is there any working example to use Ionic Deploy service

My Component code.
this.deploy.check().then((snapshotAvailable: boolean) => { => {
return this.deploy.extract().then(() =>{