// user can review, add review controls
Fragment reviewControls = new Fragment("reviewControls", "reviewControlsFragment", this);
// show "approve" button if no review OR not current score
if (user.canApprovePatchset(repository) && (myReview == null || Score.approved != myReview.score)) {
reviewControls.add(createReviewLink("approveLink", Score.approved));
} else {
reviewControls.add(new Label("approveLink").setVisible(false));
}