ioService.write( f3, "f3-u1!" );
assertNull( ws.poll() );
ioService.endBatch();
{
List<WatchEvent<?>> events = ws.poll().pollEvents();
assertEquals( 3, events.size() ); //adds files
final VersionAttributeView v = ioService.getFileAttributeView( f1, VersionAttributeView.class );
assertNotNull( v );
assertEquals( 2, v.readAttributes().history().records().size() );