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kotlinlang

For me :two: has an advantage because of the `OnClick` annotation and also the ability to use it in any class like a `ViewHolder` for example

with :one: onclick is as simple as:
```
someButton.setOnClickListener {
    // do stuff
}
```
so arguably even easier than :two: ?

Separate method is better choice for me to not create a  clutter on the `onCreate` method
```
@OnClick(R.id.some_button) fun onSomeButtonClicked() {
   // do something
}
```
but more importantly having the ability to use it in any class like a `ViewHolder` is a huge advantage for me