in generator.go [284:304]
func lookupDayValue(curr map[string]string, stdTab map[string]string, lookupTable []*Common) map[string]string {
if curr == nil && len(lookupTable) == 0 {
return nil
}
val := make(map[string]string, 7)
if curr != nil {
maps.Copy(val, curr)
}
for _, day := range lookupTable {
d, ok := stdTab[day.Type]
if !ok {
continue
}
val[d] = day.CharData
}
return val
}