private ProcessActivity ProcessActivityClone(ProcessActivity activity) =>
new ProcessActivity()
{
Start = activity.Start,
End = activity.End,
LinkProcess = activity.LinkProcess,
GroundWorkStates = new ObservableCollection<GroundWorkState>(activity.GroundWorkStates.Select(gws => new GroundWorkState() { Title = gws.Title }))
};
private double MinutesBetween(ProcessActivity first, ProcessActivity last) => (last.Start - first.End).TotalMinutes;
