Is GitHub PR information available in an object/variable/etc. in a Pipeline job?

I'd like to be able to send an e-mail to a PR's owner/author for example.  But just the PR owner/author, not any of the authors of any other patches that may be merged into the PR, so I don't think any of email-ext's current recipientProviders can do this.

So instead I'd like to get the PR owner from this plugin and use it as the recipient in an email-ext call.