title: Where can I find my NSCocoaErrorDomain description?
body: <p>So I'm running a command line Swift tool to manage my dock.</p>
  
  <p>The command <code>dockutil --remove #{appName}</code> works when doing it straight on the shell but when I execute it from within Swift I get this error.</p>
  
  <pre><code>Error Domain=NSCocoaErrorDomain Code=3587 "(null)"
  </code></pre>
  
  <p>Fine enough. Except that when I check up the docs there is no useful information.</p>
  
  <p>You can see for yourself here: <a href="https://developer.apple.com/documentation/foundation/nscocoaerrordomain" rel="nofollow noreferrer">https://developer.apple.com/documentation/foundation/nscocoaerrordomain</a></p>
  
  <p>Where would I be able to find this? Thinking to try a header file but not sure which one.</p>