json/encode.go
func NewPrettyEncoder(w io.Writer) *objconv.Encoder {
	return objconv.NewEncoder(NewPrettyEmitter(w))
}
func NewPrettyEncoder(w io.Writer) *objconv.Encoder {
	return objconv.NewEncoder(NewPrettyEmitter(w))
}
// NewPrettyEncoder returns a new JSON encoder that writes to w.