how to write pmml ensemble model

Hi everybody! I have created an ensemble model by using boosting strategy. How can I write and save the ensemble model? which node(s) has to be used after the boosting learner metanode?

There is a family of nodes for that:

Also via this link you can find relevant example workflows on the KNIME server:

To be completely honest I have tried a few times to set up a complete PMML ensemble but struggled getting the sequence right and all the manipulations I want to have, and then to bring that into production.