我一直遵循以下指南：step by step guide to wp list table 然而，我不知道应该在哪里定义我的操作：在代码中复制。我想添加一个链接，简单地复制相应的行，有什么想法吗？

$actions = array(
    \'edit\' => sprintf(\'<a href="?page=cruises_form&id=%s">%s</a>\', $item[\'id\'], __(\'Edit\', \'cruise_list_manager\')),
    \'delete\' => sprintf(\'<a href="?page=%s&action=delete&id=%s">%s</a>\', $_REQUEST[\'page\'], $item[\'id\'], __(\'Delete\', \'cruise_list_manager\')),
    \'duplicate\' => sprintf(\'<a href="?page=%s&action=duplicate&id=%s">%s</a>\', $_REQUEST[\'page\'], $item[\'id\'], __(\'Duplicate\', \'cruise_list_manager\')),
);

return sprintf(\'%s %s\',
    $item[\'name\'],
    $this->row_actions($actions)
    );
}