title: How to doNothing() on void method?
body: <p>I have a method that call a void function in it, and when I use <code>doNothing()</code>, it says that void method it's not allowed. How could I <code>doNothing()</code> in that specific line?</p>
  
  <p>I'm using this line,</p>
  
  <pre><code>when(spyColorSelector.initializeColors(view, "red")).then(doNothing());
  </code></pre>