protected function getProductItems( array $listItems )
	{
		$list = [];

		foreach( $listItems as $listItem ) {
			$list[] = $listItem->getRefId();
		}

		$manager = \Aimeos\MShop::create( $this->getContext(), 'product' );

		$search = $manager->createSearch()->setSlice( 0, count( $list ) );
		$search->setConditions( $search->compare( '==', 'product.id', $list ) );

		return $manager->searchItems( $search );
	}