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kotlinlang

Is it possible to use visibility modifier to have a class which can be returned by a factory but that cannot be created otherwise? Thanks

```
class Foo private constructor() {
  companion object {
    fun of(): Foo {
      return Foo()
    }
  }
}
```

Thanks, I'm gonna try it to see if I got that right :grinning:

It looks like I still have not really understood what a companion object is :disappointed:

Oh, wait, that's the equivalent of "a collection of static methods" in this case right? And that would be why I could call the of() fun without having an instance of that object to start with :thinking_face:

the companion object is essentially the closest thing Kotlin has to `static` within a class, yes

it is instantiated independently of actual class instances and is accessible from within any instance

I think it’s built when the class is loaded but I could be wrong about that