func IsZeroPseudoVersion(v string) bool {
	return v == ZeroPseudoVersion(semver.Major(v))
}

// PseudoVersionTime returns the time stamp of the pseudo-version v.
// It returns an error if v is not a pseudo-version or if the time stamp
// embedded in the pseudo-version is not a valid time.
func PseudoVersionTime(v string) (time.Time, error) {
	_, timestamp, _, _, err := parsePseudoVersion(v)
	if err != nil {