etcdserver/api/v2store/store.go
func (s *store) Save() ([]byte, error) {
	b, err := json.Marshal(s.Clone())
	if err != nil {
		return nil, err
	}

	return b, nil
}
func (s *store) Save() ([]byte, error) {
	b, err := json.Marshal(s.Clone())
	if err != nil {
		return nil, err
	}

	return b, nil
}
// Save saves the static state of the store system.
// It will not be able to save the state of watchers.
// It will not save the parent field of the node. Or there will
// be cyclic dependencies issue for the json package.