# File lib/yaml/types.rb, line 49
        def to_yaml( opts = {} )
            YAML::quick_emit( object_id, opts ) do |out|
                out.map( "tag:ruby.yaml.org,2002:object:#{ @class }", to_yaml_style ) do |map|
                    @ivars.each do |k,v|
                        map.add( k, v )
                    end
                end
            end
        end