<http://khttp.async.post|khttp.async.post>()

onResponse

Response.() -> Unit

.let

JSONObject.getString()

null

?.let { log }

interface Foo {
  val string: String?
  fun frobnicate(block: Foo.() -> Unit)
}

fun consume(foo: Foo) {
  val baz = { lad: Foo ->
    lad.string?.let(::println)
  }
  foo.frobnicate(baz)
}

val baz: (Foo) -> Unit

?: Unit

let

fun consume(foo: Foo) {
    val baz: Foo.() -> Unit = {
        string?.let(::println)
    }
    foo.frobnicate(baz)
}