debugCheckIsValidTimetableMonth method
Implementation
bool debugCheckIsValidTimetableMonth() {
assert(() {
if (isValidTimetableMonth) return true;
throw FlutterError.fromParts([
ErrorSummary('Invalid month for timetable: `$this`'),
ErrorDescription(
'A month must be an integer between 1 (January) and '
'${DateTime.monthsPerYear} (December), inclusive.',
),
]);
}());
return true;
}