dagger android injector post Main Activity injector

MainActivityInjector.kt

inline fun <reified T : Activity> createFakeMainActivityInjector(crossinline block : T.() -> Unit)
    : DispatchingAndroidInjector<Any> {
  val injector = AndroidInjector<Activity> { instance ->
    if (instance is T) {
      instance.block()
    }
  }
  val factory = Factory<Activity> { injector }
  val map = mapOf(Pair<Class <*>, Provider<Factory<*>>>(T::class.java, Provider { factory }))
  return DispatchingAndroidInjector_Factory.newInstance(map, emptyMap())
}