def belongs_to(parent_resource)
        parent_resource = parent_resource.to_sym
        parent_resources << parent_resource unless parent_resource.in?(parent_resources)
      end
def belongs_to(parent_resource)
        parent_resource = parent_resource.to_sym
        parent_resources << parent_resource unless parent_resource.in?(parent_resources)
      end
Tell a class that it's resources may be nested within another named resource

 parent_resource - A Symbol with the name of the parent resource.