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kotlinlang

Need help in converting this into a coroutine :slightly_smiling_face:
```nextButton.setOnLongClickListener {
            val handler = Handler(Looper.myLooper()!!)
            val runnable: Runnable = object : Runnable {
                override fun run() {
                    handler.removeCallbacks(this)
                    if (nextButton.isPressed) {
                        println("Do Something!")
                        handler.postDelayed(this, 500)
                    }
                }
            }
            handler.postDelayed(runnable, 0)
            true```
        }

Try using `callbackFlow`: <https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/callback-flow.html>