layout with half indent, half grid? Follow

I'm trying to create a layout that has a nested list of items on the left side, and item properties on the right. 

I have a concept Container with children items : Item[0..n]

Item is an interface concept. 

I have ContainerItem implements Item, INamedConcept, children:   container : Container[1]

I have SimpleItem implements Item, INamedConcept, properties:  something : string

I'd like to have the displayed layout be something like:

container {
  somethingValue     name
  anotherValue       anotherName
  container {        innerContainerName
     innerValue      innerName
     anotherInner    someOtherName
  }
}

What is a I can do the layout I want indent/horizontal layout when I don't have nested containers, but I'm struggling to get the nested container to work as expected.  It ends up being more like:

container {
  somethingValue               name
  anotherValue                 anotherName
  container {                  innerContainerName
     innerValue   innerName
     anotherInner someOtherName
  }
}