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kotlinlang

The classes doc mentions the following rule.

&gt;If the constructor has annotations or visibility modifiers, the constructor keyword is required

I don't see it being followed in the Google sample.

```
@Singleton
open class AppExecutors(
    private val diskIO: Executor,
    private val networkIO: Executor,
    private val mainThread: Executor
) {
```

What is going on here?

<https://github.com/googlesamples/android-architecture-components/blob/master/GithubBrowserSample/app/src/main/java/com/android/example/github/AppExecutors.kt#L35>
<https://kotlinlang.org/docs/reference/classes.html>

The docs are talking about annotations / visibility modifiers that are applied to the constructor itself.

In your example, the `val`s are marked as private, but the constructor is still public. If you wanted a private constructor, you would have to use `private constructor`.

The same would apply if for example you wanted to use the `@JvmOverloads` annotation, you would have to add the constructor keyword too

Oh okay. So it's annotations/visibility modifiers applied to the constructor. Thanks.