title: GWT: finalize object and remove its event handlers
body: <p>In GWT I have class <code>MyClass</code> that registers some event handlers. There is an object (<code>object1</code>) of <code>MyClass</code> that, at a specific moment, I want to finalize and make its handlers stop listening, because after that I am going to create a different <code>MyClass</code> object (<code>object2</code>).</p>
  
  <p>How can I do that? I already tried with <code>object1 = null</code>, but its handerls keep listening (at least for a while).</p>