func reverseSeriesVersion() map[string]string {
	reverse := make(map[string]string, len(seriesVersions))
	for k, v := range seriesVersions {
		reverse[v] = k
	}
	return reverse
}
// reverseSeriesVersion returns reverse of seriesVersion map,
// keyed on versions with series as values.
reverseSeriesVersion returns reverse of seriesVersion map,
keyed on versions with series as values.
// reverseSeriesVersion returns reverse of seriesVersion map // keyed on versions with series as values .
func reverseSeriesVersion() map[string]string {
	reverse := make(map[string]string, len(seriesVersions))
	for k, v := range seriesVersions {
		reverse[v] = k
	}
	return reverse
}
func reverseSeriesVersion ( ) map [ string ] string { reverse := make ( map [ string ] string , len ( seriesVersions ) ) for k , v := range seriesVersions { reverse [ v ] = k } return reverse }
reverseSeriesVersion returns reverse of seriesVersion map,
keyed on versions with series as values.
reverseSeriesVersion returns reverse of seriesVersion map keyed on versions with series as values .