title: Collection operations with anonymous inner classes
body: <p>I am trying to simulate a lambda in C#, and I need to reset a list element to the same map, but with values removed according to a list of keys. This is just using a simple list of maps.</p>
  
  <p>For example:</p>
  
  <pre><code>myList.set(i, myList.get(i).remove(
      //not sure what to add here... need to remove a List&lt;String&gt;
  ));
  </code></pre>