Use decorator with Singleton service (providedIn: 'root')

[TruongTheTan]

I assumed that using until-destroy in Singleton service won't work because it exists through the application.
My service is used for calling APIs and i don't want them always watch (observe) the response from an API even if its success (next) or fail (error).
Can you update this repo or any other suggestion ?

[arturovt]

It works with services provided in root.