def resources_added(resources)
      if resources.kind_of?(Enumerable)
        resources.map { |resource| resource_added(resource) }
      else
        resource_added(resources)
      end
    end
def resources_added(resources)
      if resources.kind_of?(Enumerable)
        resources.map { |resource| resource_added(resource) }
      else
        resource_added(resources)
      end
    end
Track the added resources

 @param [Array<Resource>] resources
   the resources that were added

 @return [Array<Resource>]
   the resources that were added

 @api private