zentao/extension/ipd/bug/ext/model/excel.php

<?php
public function setListValue($productID, $branch = 0)
{
    return $this->loadExtension('excel')->setListValue($productID, $branch);
}

public function createFromImport($productID, $branch = 0)
{
    return $this->loadExtension('excel')->createFromImport($productID, $branch);
}