• active_support/core_ext/enumerable
• active_support/core_ext/module/delegation
• active_support/parameter_filter
• concurrent/map

• 模組 ActiveRecord
• 模組 ActiveRecord::ConnectionAdapters
• 模組 ActiveRecord::Core
• 模組 ActiveRecord::Core::ClassMethods
• 模組 ActiveSupport
• 模組 Arel
• 類別 ActiveRecord::Core::InspectionMask