gistfile1.txt

		$existing_item = $this->get_item_by_id($new_item->get_product_id());

		if ($existing_item && $existing_item->bundle_variants && $new_item->bundle_variants) {
			$fuck_you_1 = array_keys($existing_item->bundle_variants);
			$fuck_you_2 = array_keys($new_item->bundle_variants);
			sort($fuck_you_1); sort($fuck_you_2);

			if ($fuck_you_1 != $fuck_you_2) {
				$existing_item = null;
			}
		}

		if ($existing_item) {
			$qty = $existing_item->qty + $new_item->qty;
			$existing_item->set_qty($qty);
			return $existing_item;
		} else {
			$this->quote()->items[] = $new_item;
			return $new_item;
		}