title: Exclude class from debugging
body: <p>I remember that there was some type of decorator to exclude certain classes from being show while debugging. </p>
  
  <p>Reason:</p>
  
  <p>Have multiple classes. If debugger jumps to another class (thread) during debugging, that can be very anoying. Some helper classes should rather be stepepd over.</p>
  
  <p>But I just can't find this decorator anywhere. Does anyone remember how to exclude a file so that debugger does not step into it?</p>