you can find them in the feature: Third Party Plugins for GMF.
Best regards
Hannes
PS: See the rmbench.target file inside the releng project.
we will add the fetaure dependency in the feature.xml.
You find the third party plugins only when you deactivate "group items
by category"
The name is: "Third-Party Components for GMF Runtime" and is in the
helios release train aupdate site.
regards
Hannes