There's no problem with encapsulation, see eg this...

# getting-started

[karelpeeters]

There's no problem with encapsulation, see eg this, which would be equivalent to using this in a default parameter:

class Foo {
    val foo: Foo
    constructor(foo: Foo) {
        this.foo = foo
    }
    constructor() {
        this.foo = this
    }
}