Can't find the dd function?

I installed Annotator and Annotation this morning. The Annotator code works fine, but it won't save the annotation. When I dig into the AJAX calls, I notice that the save call gets this response:

Fatal error: Call to undefined function dd() in /homepages/34/d491371592/htdocs/ches/sites/all/modules/annotator/plugins/annotator/PermissionsAnnotatorPlugin.class.inc on line 84

Is there a library I failed to install? Did I fail to flip some permissions bit? I'm running with jQuery 1.8, btw.

Thanks for checking this out.