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kotlinlang

this is idiomatically passing service class like this?:
```fun Application.myPlugin() {

    routing {
        post("/useful") {
            val result = <mailto:this@myPlugin.myService.do|this@myPlugin.myService.do>()
            call.respond(result)
        }
    }
}

val Application.myService get() = MyService(this)

class MyService(private val app: Application) {
    fun do() { app.environment.config.property("app.i-can-use-app-props-here").getString() }
}```

I don't know whether this idiomatic or not but I would make a parameter for the service in the `Application.myPlugin` method and require only direct dependencies in the constructor of the service:
```fun Application.myPlugin(service: MyService) {
    routing {
        post("/useful") {
            val result = service.doIt()
            call.respond(result)
        }
    }
}

class MyService(private val appConfig: ApplicationConfig) {
    fun doIt() {
        appConfig.property("app.i-can-use-app-props-here").getString()
    }
}```