Request for Recent Code Sample Using `Effect.Service` and `Effect.optionalService`

I'm looking for a more recent sample of code around services copnstructed via the

Effect.Service

Effect.Service

and leveraging

Effect.optionalService

Effect.optionalService

for one of their dependencies, anyone have a code sample they'd be willing to share?

Request for Recent Code Sample Using `Effect.Service` and `Effect.optionalService` - Effect Community