example-smart-reply-impl.kt

// create smart-reply instance
val smartReply = FirebaseNaturalLanguage.getInstance().smartReply

// message list
val conversation = ArrayList<FirebaseTextMessage>()

// add messages on conversation
...

// get suggested messages
smartReply.suggestReplies(conversation)
            .addOnSuccessListener { result ->
                result.apply {
                    when (status) {
                        STATUS_NOT_SUPPORTED_LANGUAGE -> // Not Supported Language
                        STATUS_SUCCESS -> // result.suggestions
                        else -> // ...
                    }
                }
            }
            .addOnFailureListener{
              // onFailure
            }