| ⇢ | B | ConvertHelper_DurationConverter added |
| ⇢ | F | ConvertHelper_DurationConverter::convert() added | |
| ⇢ | A | ConvertHelper_DurationConverter::setDateFrom() added | |
| ⇢ | A | ConvertHelper_DurationConverter::__construct() added | |
| ⇢ | A | ConvertHelper_DurationConverter::setDateTo() added | |
| F | ↗ | A | ConvertHelper::duration2string() improved |