Bug 154064 Need a way to access the TreeItem or TableItem on a refresh
It is not currently possible to know when an item is refreshed. This is required for ownerDraw support in viewers.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableViewer.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.StructuredViewer#assertContentProviderType(org.eclipse.jface.viewers.IContentProvider)
	 */
	protected void assertContentProviderType(IContentProvider provider) {
		Assert.isTrue(provider instanceof IStructuredContentProvider
				|| provider instanceof ILazyContentProvider);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#getRowPartFromItem(org.eclipse.swt.widgets.Widget)
	 */
	protected ViewerRow getRowPartFromItem(Widget item) {
		ViewerRow part = (ViewerRow)item.getData(ViewerRow.ROWPART_KEY);
		
		if( part == null ) {
			part = new TableViewerRow(((TableItem)item));
		}
		
		return part;
	}
		
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.StructuredViewer#createNewRowPart(org.eclipse.jface.internal.viewers.RowPart, int, int)
	 */
	protected ViewerRow createNewRowPart(ViewerRow parent, int style, int rowIndex) {
		TableItem item;