Reusable injections

ReusableInjection.kt

class Parent {

  // Somewhere in here, a lot of external service modules are included and contribute their `Service` impls to this multibinding
  @Inject lateinit var services: Map<String, Provider<Service>>

  fun showChild() {
    addChildController(serviceKey = "barServiceKey") // Key into the services map
  }

}

// Child class could be some presentation UI, reusable and just shows data based on a given service
class Child {

  // Currently, I have to inject this services map as a whole
  // I'd like to get this down to something that only exposes the Service for better isolation
  @Inject lateinit var services: Map<String, Provider<Service>>
  lateinit var actualService: Service
  
  // So what I'd like to do is something that lets me swizzle this down to be able to do this based on what's found at compile time
  // @Inject lateinit var service: Service

  fun performInjection() {
    // do injection...
    actualService = services[getArguments()["serviceKey"]].get()
  }

  fun showUi() {
    with(actualService) {
      // Show data
    }
  }
}