title: How to insert a NSButton into a NSTextView? (inline)
body: <p>I have a NSTextView and a custom NSButton. What I want to do is to insert that button (60x16 in size) to the end of the NSTextView.<br>
  How can I do something like that? I've been trying to search around on how to do this but I'm not getting anywhere. <br>
  Where should I begin? Thanks</p>