• 模块 ActiveModel
• 模块 ActiveModel::Type
• 模块 ActiveRecord
• 模块 ActiveRecord::MessagePack
• 模块 ActiveRecord::MessagePack::Extensions
• 模块 ActiveSupport
• 类 ActiveModel::Type::Binary
• 类 ActiveRecord::MessagePack::Decoder
• 类 ActiveRecord::MessagePack::Encoder