format_version=

# File activerecord/lib/active_record/marshalling.rb, line 10
      def format_version=(version)
        case version
        when 6.1
          Methods.remove_method(:marshal_dump) if Methods.method_defined?(:marshal_dump)
        when 7.1
          Methods.alias_method(:marshal_dump, :_marshal_dump_7_1)
        else
          raise ArgumentError, "Unknown marshalling format: #{version.inspect}"
        end
        @format_version = version
      end