Question

I want to make a composition with two objects. I can do it with objects nesting:

object Composition {
  object SomePartOfComposition {
    // some body
  }
}

But the body of SomePartOfComposition is such long, that I want it in a separate file. How can I do that?

// edit

I know, that I can use trait. But I want strict one to one relation – it is a singleton.

Answer 1

object Composition {
  object SomePartOfComposition extends SomePartTrait
}

trait SomePartTrait{
   //in it's own file
   //implement the body here
}