private void safeRemoveTimeEntry(long id)
{
var collectionIndex = TimeEntries.IndexOf(c => c.Any(vm => vm.Id == id));
if (collectionIndex < 0)
{
return;
}
var item = TimeEntries[collectionIndex].First(vm => vm.Id == id);
TimeEntries.RemoveFromChildCollection(collectionIndex, item);
RaisePropertyChanged(nameof(IsEmpty));
}