HMSPushService.kt

override fun onMessageReceived(remoteMessage: RemoteMessage?) {
    super.onMessageReceived(remoteMessage)
    remoteMessage?.let {
        if(it.data.isNotEmpty()){
            //data message
            try {
                val pushDataModel= Gson().fromJson(it.data,PushDataModel::class.java)
                handleNotification(pushDataMceodel)
            }
            catch (e:Exception){
                e.printStackTrace()
            }
        }
        it.notification?.let {
            //notification handling
        }
    }
}