Kotlin Android Extensions in Adapter

Sometimes is difficult to use kotlin android extensions, the best way to use Kotlin synthetic in Adapter or ViewHolder is like this:

override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val item = tasks[position]
holder.bind(item, checkTask, deleteTask)
}

No need to write

val tvTask = view.findViewById(R.id.tvTask)
tvTask.text = task.description

Just

 
itemView.task_item_textView.text = task.description

Or in fun bind you can put

 = with(itemView)

All the fun

fun bind(task: Task, checkTask: (Task) -> Unit, deleteTask: 
(Task) -> Unit) = with(itemView){
            task_item_textView.text = task.description
            task_item_done_checkBox.isChecked = task.completed
            task_item_done_checkBox.setOnClickListener{checkTask(task)}
            setOnClickListener { deleteTask(task) }
        }

Example in Git Hub