title: Is there a straightforward way to add a UIButton click listener in Kotlin IOS?
body: <p>The signature for <code>addTarget</code> (in Kotlin) is:</p>
  <pre><code>public open external expect fun addTarget(
      target: Any?,
      action: COpaquePointer? /* = CPointer&lt;out CPointed&gt;? */,
      forControlEvents: UIControlEvents /* = ULong */
  ): Unit
  </code></pre>
  <p>I think I get how I'd hand in a C function pointer, but that doesn't seem to be the case here...?</p>