foo.go

package foo

import "fmt"

func NewThing() *Thing {
	return &Thing{
		Name:  "Thing",
		other: make(other),
	}
}

type Thing struct {
	Name string
	other
}

type other map[string]string

func (o *other) Set(k, v string) {
	*o[k] = v
}

func (o *other) Dump() {
	for k, v := range *o {
		fmt.Println(k + "=" + v)
	}
}

/*
func (o *other) MarshalYAML() (interface{}, error) {
	return o.data, nil
}

func (o *other) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var out map[string]string
	err := unmarshal(&out)
	if err != nil {
		return err
	}
	o.data = out
	return nil
}
*/