rangeHash function
Implementation
int rangeHash(DatepickerDateRange? range) =>
(range?.title.hashCode ?? 0) ^ (range?.start.hashCode ?? 0) ^ (range?.end.hashCode ?? 0);
int rangeHash(DatepickerDateRange? range) =>
(range?.title.hashCode ?? 0) ^ (range?.start.hashCode ?? 0) ^ (range?.end.hashCode ?? 0);