| 1234567891011121314151617181920 | package registryimport (	"encoding/json"	"github.com/go-kratos/kratos/v2/registry")func marshal(si *registry.ServiceInstance) (string, error) {	data, err := json.Marshal(si)	if err != nil {		return "", err	}	return string(data), nil}func unmarshal(data []byte) (si *registry.ServiceInstance, err error) {	err = json.Unmarshal(data, &si)	return}
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