module AWS::S3::ACLObject::ClassMethods

def body_xml_list_content(list_element, method_name)
  add_xml_child(method_name) do |list|
    list_content = list.map { |member| member.to_s }.join
    if list_content.empty?
      "<#{list_element}/>"
    else
      "<#{list_element}>#{list_content}</#{list_element}>"
    end
  end
end