Commented Issue: consider how nulls are represented with IEdmObject. [1014]

IEdmObject right now tracks entity instances only which are not nullable. Once, we add support for IEdmObject with complex types and collections, we have to figure out a way to represent null values as IEdmObjects. One strategy could be to have EdmNullValue that implements IEdmObject.
Comments: Please resolve this when the untyped support is checked in.