title: Get User Role Based on ID in bbPress
body: <p>I'm trying to add a column to bbPress 2.x that lists the last person to reply to a topic and adds a specific class to the <li> if that person is a moderator or keymaster. Unfortunately, I can't find any documentation on the template tags in 2.x. So far, I've been able to get the user ID for the last reply, but I can't seem to find the function that would get the role information for that user based on their ID.</p>
  
  <p>Here's the code that gets the ID:</p>
  
  <pre><code>$reply_author_id = bbp_get_reply_author_id( array(  'post_id' =&gt; bbp_get_topic_last_active_id() ) );
  </code></pre>
  
  <p>How can I get their bbPress role based on that ID?</p>
  
  <p>Thanks</p>