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kotlinlang

It's basically for compatibility with hibernate - if I make a class like this:

```
@Entity
data class Form(@Id @GeneratedValue override var id: Long? = null,
                override var date: Date? = null,
                override var name:String? = null) : Post
```

Then, it's good. Except, I now have setters

Checkout: <https://kotlinlang.org/docs/reference/compiler-plugins.html#no-arg-compiler-plugin>

So, you apply the plugin on your `@Entity`
Then you’d be able to use `val` like you would normally, also with the advantage of avoiding unnecessary `null`s

```
@Entity
data class Form(
  @Id @GeneratedValue override val id: Long,
  override val date: Date,
  override val name: String
): Post
```