A modern programming language that makes developers happier.

kotlinlang

Something like this?
```
private lateinit var USER_REPOSITORY: UserRepository

@Configuration
class UserEntityConfiguration(userRepository: UserRepository) {
	init {
		USER_REPOSITORY = userRepository
	}
}

interface UserRepository : JpaRepository&lt;User, Long&gt;

@Entity
class User(override var id: Long?) {
	fun save(): User = USER_REPOSITORY.save(this)
}
```
Too much boilerplate for my taste, but will work.
Alternatively you could make base entity class and write `save` once, e.g. using `EntityManager`.