title: How to make a mocked method return the same mock
body: <p>I am trying to mock a class that contain a <code>clone</code> method. I want the clone to return the same mock :</p>
  
  <pre><code>when(regressor.cloneWithSharedResources()).thenReturn(regressor);
  </code></pre>
  
  <p>However, this returns me a different object. Is there a convenient way to do that ?</p>