func ParseEtcdVersion(s string) (*EtcdVersion, error) {
	v, err := semver.Make(s)
	if err != nil {
		return nil, err
	}
	return &EtcdVersion{v}, nil
}

// MustParseEtcdVersion parses a SemVer string to an EtcdVersion and panics if the parse fails.
func MustParseEtcdVersion(s string) *EtcdVersion {
	return &EtcdVersion{semver.MustParse(s)}
}

// String returns the version in SemVer string format.
func (v *EtcdVersion) String() string {