Any sample for custom Link Controls on Inherited process templates?

[pbcahill]

I am trying to develop a custom extension that will allow us to add a custom links control to an inherited process template. The default "Related Work" links control is far too generic, and our users get incredibly confused by the dozens of different link types, always get links messed up, which in turns completely messes up query and backlog/board results.

Basically I want to be able to add defined link control sections like we can with XML process templates. For example in a child links control section, it will only allow work item links to be added with the 'Child' link type.

I believe this would need to be a WorkItemFormGroup contribution type, but beyond that I can't find any documentation or examples specifically around work item link controls.