dummy = function() {
	      return 1;
	    }
We used to allow keyed objects to serve as a collection of ReactElements,
or nested sets. This allowed us a way to explicitly key a set a fragment of
components. This is now being replaced with an opaque data structure.
The upgrade path is to call React.addons.createFragment({ key: value }) to
create a keyed fragment. The resulting data structure is opaque, for now.