IsItemVisible
bool IsItemVisible() const;
if (reinterpret_cast<BListItem*>(list.ItemAt(index))->IsItemVisible())
if (!firstItem->IsItemVisible() || !secondItem->IsItemVisible())
if (item->IsItemVisible()) {
if (subItem->IsItemVisible())
if (superItem->IsItemVisible() && superItem->IsExpanded()) {
if (!super->IsItemVisible() || !super->IsExpanded()) {
|| (superItem->IsItemVisible() && superItem->IsExpanded())) {
if (!item->IsItemVisible()) {
if (item->IsItemVisible()) {