Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceTreeAndListGroup.java
whiteCheckedTreeItems.remove(treeElement);
		}
    }
    /**
     *	Handle the collapsing of an element in a tree viewer
     */
    public void treeCollapsed(TreeExpansionEvent event) {
        
    }
    /**
     *	Handle the expansionsion of an element in a tree viewer
     */
    public void treeExpanded(TreeExpansionEvent event) {
        expandTreeElement(event.getElement());
    }
    /**
     *  Callback that's invoked when the checked status of an item in the tree
     *  is changed by the user.
     */
    protected void treeItemChecked(Object treeElement, boolean state) {
        
        setTreeChecked(treeElement, state);
        Object parent = treeContentProvider.getParent(treeElement);
        
        
        if (parent == null || parent instanceof IWorkspaceRoot) {
			return;
		}
         
        if (state) {