getTimeStr function
format(2018.09.08 11:22:333)
Implementation
String getTimeStr(DateTime dateTime) {
return "${twoNum(dateTime.year)}.${twoNum(dateTime.month)}.${twoNum(dateTime.day)}-"
"${twoNum(dateTime.hour)}:${twoNum(dateTime.minute)}:${twoNum(dateTime.second)}:${dateTime.millisecond}";
}