isOngoing method
Like isOngoing, but check dateTime
's date only
Implementation
@override
bool isOngoing(DateTime dateTime) =>
(dateTime.year >= _dt.year &&
dateTime.month >= _dt.month &&
dateTime.day >= _dt.day) &&
(dateTime.year <= _untilDt.year &&
dateTime.month <= _untilDt.month &&
dateTime.day <= _untilDt.day);