How do I have several Jira REST calls that start with /grainger?

[Rich Scire]

I've created several Jira REST plug-ins. I would like them all to be called with a URL starting with /grainger, e.g.

• /grainger/1.0/grcall1/..
• /grainger/1.0/grcall1/...

In the atlassian-plugin.xml file I have:

  <rest name="Resource Units" i18n-name-key="resource-units.name" key="resource-units" path="/grainger" version="1.0">
    <description key="resource-units.description">...</description>
  </rest>

However, whan I have more than one plugin described this way, they overwrite each other and only one is available at a time. How should I configure the plugin to do what I want?