Assert.assertEquals("Expect just 2 alignment frames", 2, alfs.length);
// internal paste should yield a new alignment window with shared dataset
AlignmentI dataset = internalSource.getViewport().getAlignment()
Assert.assertEquals("Expect just 2 alignment frames", 2, alfs.length);
// internal paste should yield a new alignment window with shared dataset
AlignmentI dataset = internalSource.getViewport().getAlignment()