ccocchi/rabl-rails — pull request #13 by fnordfish (2012-12-11 17:38:44+00:00)
Title: Allow nodes with `nil` key to get merged into main

This is like calling `extends` but changing the inner object.

Example:

```ruby
collection :@child_objects

node(nil) { |child_object| partial 'parents_detail', object: child_object.my_parent }
```