Rollout a single product from a catalog

Hi people,

My actual code is rolling out all the products from a catalog, using the method:

rolloutChanges (Page  master, Page  target, boolean reset) - docs

I'm trying to rollout to generate the product pages from this catalog, but specifying what product I want to rollout and generate the product page. I've tried the other documentation methods:

executeProductRolloutHooks (Resource productComponent);

executePageRolloutHooks (Page page, boolean reset);

but nothing seems to work.

Don't know if I was clear to explain what I'm trying to do.

Thanks in advance for the help.

Edit: using AEM version 6.5

When I tried to use executeProductRolloutHooks, it always give a null pointer exception and don't generates the pages.