ContainerExtension afterStart doesn't have the container as parameter or receiver

[tibtof]

In our project we have a lot of SharedTestContainerExtensions defined like this:

 SharedTestContainerExtension(
    GenericContainer("")
  ) {
    //set env["my.container.url"] = "http://localhost:$firstMappedPort"
  }

The problem when migrating to ContainerExtension is that the lifecycle function afterStart doesn't receive the container as a parameter. I would have expected the equivalent to be:

 ContainerExtension(
    container = GenericContainer(""),
    afterStart = {
      //set env["my.container.url"] = "http://localhost:$firstMappedPort"
    }
  )

I think that having container as receiver for the related lifecycle functions (at least for afterStart) should be useful:

class ContainerExtension<T : GenericContainer<*>>(
   private val container: T,
   private val mode: ContainerLifecycleMode = ContainerLifecycleMode.Project,
   private val beforeStart: T.() -> Unit = {},
   private val afterStart: T.() -> Unit = {},
   private val beforeTest: suspend (TestCase) -> Unit = { _ -> },
   private val afterTest: suspend T.(TestCase) -> Unit = { _ -> },
   private val beforeSpec: suspend T.(Spec) -> Unit = { _ -> },
   private val afterSpec: suspend T.(Spec) -> Unit = { _ -> },
   private val beforeShutdown: T. () -> Unit = {},
   private val afterShutdown: T.() -> Unit = {},
)