title: Nest two inner class with the main class
body: <p>I want to draw the class diagram of my Android system. I have a class which contains two inner classes in it I am facing problem to nest the both since <code>Astah</code> just allows to nest one inner class and in the case that another inner class edge is already available it is being deleted.</p>
  
  <p>How can I nest two inner classes with Astah?  </p>