String (@NotNull Matcher matcher) { if (matcher.group(DEV_RELEASE_TYPE_GROUP) != null) { final String devReleaseNumber = matcher.group(DEV_RELEASE_NUMBER_GROUP); final String normalizedDevReleaseNumber = devReleaseNumber == null ? "0" : normalizeNumber(devReleaseNumber); return "dev" + normalizedDevReleaseNumber; } return null; }