Access to AEM Publish Code

We have previously created a custom workflow that allows for publishing to a staging environment instead of directly to production.  This allows our authors to preview their changes in an integrated environment before going live in production.

Recently, we have started to experiment with Target Integration with AEM.  We have noticed that when we publish the page containing targeting, we get all of the campaign/experience references published as well.  However, our custom workflow is not picking up those references.

Can someone point us to the location of the Publish code in order for us to decompile and adjust our custom workflow accordingly?  We are using AEM 6.2.

Please let me know if you need any additional information.

Thanks for the help!