/**
* Clear collection
*
* @return $this
*/
public function clear()
{
foreach ($this->_items as $i => $item) {
if ($item->hasStockItem()) {
$item->unsStockItem();
}
$this->_items[$i] = null;
}
foreach ($this->_itemsById as $i => $item) {
$this->_itemsById[$i] = null;
}
unset($this->_items, $this->_data, $this->_itemsById);
$this->_data = [];
return parent::clear();
}
