title: GWT CellTree Selection of Parent nodes
body: <p>I'm trying to use the GWT CellTree to display a heterogeneous, hierarchical data model. I need to be able to a single selection, but be able to select Parent nodes as well as child nodes.  For example, if you look at GWT's own <a href="http://google-web-toolkit.googlecode.com/svn/trunk/user/javadoc/com/google/gwt/examples/cellview/CellTreeExample2.java" rel="nofollow">example</a>, you'll see that they only provide one selection model for the leave nodes.  </p>
  
  <p>I tried to extend their example by providing one selection model for all nodes.  However, that seems impossible.  So what I ended up with where 3 SelectionModels one for each node type (Composer, PlayList, Song).</p>
  
  <p>What am I missing?</p>
  
  <p>Thanks in advance. </p>