// FindBuildId finds a build ID in the version data's sets, returning (set index, index within that set).
// Returns -1, -1 if not found.
func FindBuildId(versioningData *persistencespb.VersioningData, buildId string) (setIndex, indexInSet int) {
worker_versioning.go
versionSets := versioningData.GetVersionSets()
for sidx, set := range versionSets {
for bidx, id := range set.GetBuildIds() {
if buildId == id.Id {