install

# File activerecord/lib/active_record/message_pack.rb, line 25
      def install(registry)
        registry.register_type 119, ActiveModel::Type::Binary::Data,
          packer: :to_s,
          unpacker: :new

        registry.register_type 120, ActiveRecord::Base,
          packer: method(:write_record),
          unpacker: method(:read_record),
          recursive: true
      end