Bug 292322 [Viewers] Tree view is removing + indicator when one of multiple children is removed.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
}
			virtualLazyUpdateWidget(parent, index);
		}
	}
	/*
	 * (non-Javadoc)
	 *
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#internalRefreshStruct(org.eclipse.swt.widgets.Widget,
	 *      java.lang.Object, boolean)
	 */
	protected void internalRefreshStruct(Widget widget, Object element,
			boolean updateLabels) {
		if (contentProviderIsLazy) {
			
			if (widget instanceof Tree) {
				((Tree) widget).clearAll(true);
			} else if (widget instanceof TreeItem) {
				((TreeItem) widget).clearAll(true);
			}
			int index = 0;
			Widget parent = null;
			if (widget instanceof TreeItem) {
				TreeItem treeItem = (TreeItem) widget;
				parent = treeItem.getParentItem();
				if (parent == null) {
					parent = treeItem.getParent();
				}
				if (parent instanceof Tree) {
					index = ((Tree) parent).indexOf(treeItem);
				} else {