module ActiveModel::AttributeRegistration::ClassMethods

def apply_pending_attribute_modifications(attribute_set)
  if superclass.respond_to?(:apply_pending_attribute_modifications, true)
    superclass.send(:apply_pending_attribute_modifications, attribute_set)
  end
  pending_attribute_modifications.each do |modification|
    modification.apply_to(attribute_set)
  end
end