inHours property
int inHoursReturns the number of whole hours spanned by this Duration.
The returned value can be greater than 23.
Source
int get inHours => _duration ~/ Duration.MICROSECONDS_PER_HOUR;
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/Duration/inHours.html