# File lib/active_record/attribute_methods/read.rb, line 134
      def unserialize_attribute(attr_name)
        coder = self.class.serialized_attributes[attr_name]
        unserialized_object = coder.load(@attributes[attr_name])

        @attributes.frozen? ? unserialized_object : @attributes[attr_name] = unserialized_object
      end