为什么我不能删除刚刚找到的子元素?NOT_FOUND_ERR

I'm building a script which has to patch XML files, including replacing one list of elements with another. The following function applies a patch (involving a possibly empty list of elements with the same name) onto a parent Element's list of elements by the same name (also possibly an empty list). (This is only a small part of the patching logic).I'm building a script which has to patch XML fi