title: How do I check if an issue is a pull request?
body: <p>I'm building a Github App. I receive an <a href="https://developer.github.com/v3/activity/events/types/#issuecommentevent" rel="nofollow noreferrer"><code>issue_comment</code></a> webhook. Is there any quick way for me to know whether the comment was made in a pull request of not?</p>