Bug 172019 [Viewers] Plus sign doesn't disappear when using deferred content providers
3.3 M4 Use a tree viewer with a content provider using IDeferredWorkbenchAdapter and DeferredTreeContentManager. When fetchDeferredChildren is call and no elements are reported to the element collector the plus sign of the node doesn't disappear. This work without problems under Windows and Mac/OS (e.g. the plus sign disappears).
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
ArrayList v = new ArrayList();
		internalCollectVisibleExpanded(v, getControl());
		return v.toArray();
	}
	private void internalCollectVisibleExpanded(ArrayList result, Widget widget) {
		Item[] items = getChildren(widget);
		for (int i = 0; i < items.length; i++) {
			Item item = items[i];
			if (getExpanded(item)) {
				Object data = item.getData();
				if (data != null) {
					result.add(data);
				}
				
				
				internalCollectVisibleExpanded(result, item);
			}
		}
	}
	/**
	 * Returns the tree path for the given item.
	 * @param item
	 * @return {@link TreePath}
	 * 
	 * @since 3.2
	 */
	protected TreePath getTreePathFromItem(Item item) {
		LinkedList segments = new LinkedList();
		while (item != null) {
			Object segment = item.getData();