private void UpdateAvailableLifeCycles(UpdateDistribution command, Distribution distribution)
{
(IList <LifeCycleState> newStates, IList <LifeCycleState> oldStates) =
collectionsComparer
.Compare(distribution.AvailableLifeCycles, command.AvailableLifeCycles);
distribution.AddAvailableLifeCycleStates(newStates);
distribution.RemoveAvailableLifeCycleStates(oldStates);
}