isAfterOrSameDay method
Implementation
bool isAfterOrSameDay(DateTime firstTime, DateTime endTime) {
var cond = false;
if (endTime.isAfter(firstTime)) cond = true;
if (firstTime.day == endTime.day &&
firstTime.month == endTime.month &&
firstTime.year == endTime.year) cond = true;
return cond;
}