private IChangeSet <T> Process(ChangeAwareList <T> target, IChangeSet <T> changes)
{
// if all removes and not Clear, then more efficient to try clear range
if (changes.TotalChanges == changes.Removes && changes.All(c => c.Reason != ListChangeReason.Clear) && changes.Removes > 1)
{
var removed = changes.Unified().Select(u => u.Current);
target.RemoveMany(removed);
return(target.CaptureChanges());
}
return(ProcessImpl(target, changes));
}