Modify file name 'add-rxjs-operators.ts' to 'rxjs-operators.ts', according to real file name. Ref: https://angular.io/resources/live-examples/server-communication/ts/plnkr.html
Modify file name 'add-rxjs-operators.ts' to 'rxjs-operators.ts', according to real file name. Ref: https://angular.io/resources/live-examples/server-communication/ts/plnkr.html