How To You write own plugins using developer API from Importers Plugin?

[Ludwig]

You mentiond with version 5.0.2

"You can now easily write your own plugins using developer API that this JIRA Importers Plugin introduces."

But Where is the documentation? Exists there an example?

[JamieA · Accepted solution]

A good example would be greenhopper, which you can get the source of (10$ licence if you don't own it already).

This has the option to create a pre-populated project, along with a board. This uses the importers' API.