Answered Display only siblings

We have a fair number of products, each with 8 child pages. As these pages are for info after the purchase, they are essentially stand alones and so we want Wayfinder to only display the 8 child pages.

Creating a Wayfinder menu manually is not an issue, but what I am hoping for is a way to automatically set the startId to the parent resource. And ideally something that can be coded into the template.

Is there any sort of parentId tag ie: that could be used for the Wayfinder startId property?

I saw the getParentId in the snippet options, which may be a work around, but does require slightly more processing each time a page is served.

Thanks for any suggestions.

Thanks Bruno17 ... that was simple enough ... and now going back through my MODX book, there it is staring me in the face. Some days the brain just doesn't seem to work.